hp HSTNN-UB02 battery

Change HP Pavilion DV4 1103TX OS Vista to XP

After several hours practice, I have successfully changed my HP Pavilion DV4 1103TX OS from Vista to XPHp laptop battery. Now let me introduce my experience when you install the XP OS to your Pavilion DV4 1103TX.

I bought my HP Pavilion DV4 in April 02 in HP store. To avoid some trouble, I decide install XP into my Notebook in April 19 ( 15 days after I buy the notebook, as the HP supply the 15 days free replacing ). Please notice this :The HP Pavilion DV4 hard disk is the ICH9 SATA DISK. Some XP OS edition driver cant support the ICH9. I tried many XP OS edition to face the situation. Not all the HP Pavilion series laptop are ICH9 SATA disk, that means you dont need to special download the ICH9 XPS SP3 for Pavilion DV1000 battery, Pavilion DV2000 battery, Pavilion DV4000 battery, Pavilion DV6000 battery, Pavilion DV8000 battery, Pavilion ZV5000 battery, Pavilion zv6000 battery.

To ensure the OS change cant effect the HP quality warranty. I called the HP customer center to query the problem.HSTNN-DB02, They said that they are not accountable to the broken of userself bios fresh, but they say I can change my notebook OS to XP SP2 without bios freshing. But when I finished my XP SP2 install, the voice card driver cant work. So I must fresh my bios, you only need to notice that dont interruption of power supply when you fresh BIOS.

Please notice that :346970-001, HSTNN-DB02, HSTNN-UB02, DP390A, PP2100, Please fresh the F11C BIOS program before you install the XP OS, or you must reinstall the OS again.

Now let me install the XP SP3 into my Pavilion DV4 step by step:

First download or buy ICH9 XP SP3 CD (the CD must be ICH9 XPS SP3), you can google it

Then prepare the F.11C-BIOS fresh program. Fresh the F.HSTNN-UB02,11C-BIOS here : http://www.icare.hp.com.cn/TechCenter_StaticArticle/45904/59726.zip

The BIOS only can be freshed in DOS.

Next you only to install the XP SP3 into your notebook in standard step. Dont care of the black screnn when installing.

After finish the install, you can go to XP edition desktop to fresh all the driver.

Chip set : http://h30445.www3.hp.com/pub/softpaq/sp39001-39500/sp39316.exe

Video card Driver : ftp://file6.mydrivers.com/display/nvidia_gfgo_17637_xp32.zip

Card reader driver : http://www.icare.hp.com.346970-001, HSTNN-DB02, HSTNN-UB02, DP390A, PP2100,cn/TechCenter_StaticArticle/45904/59729.zip

Hotkey driver : http://www.icare.hp.com.cn/TechCenter_StaticArticle/45904/59735.zip

Finger driver : http://www.icareDP390A, .hp.com.cn/TechCenter_StaticArticle/45904/59810.zip

Net work Card Driver : ftp://file6.mydrivers.com/net/realtek_rtl8100e_702_xp.zip

WLAN Card Driver : Intel ftp://ftp.hp.com/pub/softpaq/sp40001-40500/sp40120.exe

Broadcom ftp://ftp.hp.com/pub/softpaq/sp39501-40000/sp39912.exe

Modem driver : ftp://ftp.hp.com/pub/softpaq/sp39501-40000/sp39689.exe

Voice card driver : ftp://ftp.hp.com/pub/softpaq/sp38501-39000/sp38558.exe

Please Notice this : as I install the XP SP38558 OS,346970-001, HSTNN-DB02, HSTNN-UB02, DP390A, PP2100, first we must uninstall the originally voice card driver. Then install the download voice card driver. Also you can install XP SP3 in to you pavilion DV5, pavilion DV5T, Pavilion DV7.

In the end fresh the F11C BIOS, restart the notebook , then you will find your notebook works fine with all drivers. Pavilion ZD7000,You can update your Pavilion DV1000 battery, Pavilion DV4000 battery, Pavilion ZV5000 battery, Pavilion zv6000 battery XP OS to XP SP3 without redownload all drivers and BIOS.

Presario 2500(compaq 2500 battery),

Batteries INFO

Battery types and characteristics of

Nickel-cadmium battery (Ni-Cd): It is used in notebook batteries senior figures, Hp laptop battery,but because it has serious memory effect as well as the anode material used in nickel (Ni) on the environment will be toxic and cause pollution, it is notebook soon be abandoned, and replaced by the better nickel-hydrogen batteries.

Nickel-metal hydride battery (Ni-MH): It is the structure of nickel-cadmium batteries are basically the same principle, F4812A, 319411-001, Presario 2100(compaq 2100), Presario 2500(compaq 2500 battery), Presario NX9010,only the cathode into better performance, more environmentally-friendly non-toxic Nickel - Metal Hydride Materials. Although it was only a small change, but it has brought performance greatly enhanced. It also has a way to make nickel-cadmium batteries to catch up with the advantages of memory effect is not obvious, thus we do not have to hate for the memory effect of the troubles and thus more convenient to use. Although Ni-MH battery performance is very good, but with technological advances it was the quality of lighter, higher energy density lithium batteries replaced, has become a laptop battery in the history of flower of yesterday.

Lithium battery : a lot of people think that lithium batteries means that we now commonly used in lithium polymer batteries, F4812A,lithium batteries in fact, lithium-ion batteries including the (Li-MO2) and lithium polymer batteries (Li-ion) two. Since Li-MO2 battery to enter the market in 1989 when the bombing happened on fire and collapse, thus it from the people's attention quickly disappeared, replaced by safer lithium polymer batteries. Its light weight, in the same capacity under its weight of only Ni-MH batteries 1 / 2 around, so it quickly became the movement's new darling of portable devices has been used by the majority of laptop, notebook batteries are now the backbone.

Fuel Cell (Fuel Cell): fuel cells are the future of notebook battery star, it has a lot of types, including proton exchange membrane fuel cell (PEM), alkaline fuel cell (AFC) and solid oxide fuel cell (SOFC), etc. However, because of the fuel cell start-up time and operating temperature and other reasons in fact suitable for laptop use only the fuel cell proton exchange membrane fuel cell (PEM). PEM fuel cells are methanol fuel used and so on,F4812A, 319411-001, Presario 2100(compaq 2100), Presario 2500(compaq 2500 battery), Presario NX9010, by the positive and negative electrode composed of the principle of its power generation is the result of methanol to hydrogen re-enter the anode and oxygen enter the cathode, through the catalyst, hydrogen atoms into protons and electronics, by different path into the cathode,319411-001, electronic electricity generated through internal cycle, protons through the electrolyte to reach cathode, combine with oxygen and electronic hot water and after. The experts agreed that restricting commercial application of fuel cells The biggest factor is the fuel cell to use metal platinum (Pt) or platinum catalyst to do so that production costs have been high, the current fuel cell production costs in the 500 ~ 1000 U.S. dollars / kW. Studies have shown that only when the fuel cell production costs fell to 50 U.S. dollars / kilowatt level can be truly accepted by consumers. Fuel cells are the main reason for the high cost of production has yet to take shape, once mass production stage, the price of fuel cells battery will certainly be greatly reduced.

Electric car battery maintenance

At present, non-polluting electric vehicles because of their advantages such as light and favored by consumers, and mileage are the consumer to measure the length of electric vehicles, one of the main criteria for good or bad. As we all know, electric vehicle batteries are played a decisive role, F4812A, 319411-001, Presario 2100(compaq 2100), Presario 2500(compaq 2500 battery), Presario NX9010,then the electric car battery maintenance should pay attention to what problem? The following advice is for reference only.

First, when stored electricity deficit

Deficit refers to the status of electric batteries did not recharge after use. Electricity in the loss of state under sulfate, Presario 2100(compaq 2100),lead sulfate crystals attached to a very board, plug the electric ion channels, resulting in charge did not fall. Electricity losses the longer the idle state, the battery battery, the more serious damage.

Second, regular inspections

In the use of process, if the continued line of electric vehicles in a short period of time a sudden drop in mileage more than ten kilometers, it is likely that the battery pack at least one battery has appeared off grid, plate to soften, falling plate active material, such as short-circuit phenomenon . At this point, should be timely and professional bodies to check the battery repair, restoration and distribution group. This can extend the battery life relative to maximize cost savings.

Three, to avoid large current discharge

Electric cars at the starting line, manned, uphill,F4812A, 319411-001, Presario 2100(compaq 2100), Presario 2500(compaq 2500 battery), Presario NX9010, please use pedal power to help avoid a momentary high-current discharge.Presario 2500(compaq 2500 battery), Large current discharge have easily lead to the crystallization of lead sulfate, to the detriment of the physical properties of the battery plate.

Fourth, correctly grasp the charging time

In the use of process, should be based on the charging time to grasp the actual situation, the general batteries are recharged at night, the average time in about eight hours. If the shallow discharge, the battery will soon be filled and continue to charge-off charge will appear, and that leads to cell loss, fever, lower battery life. Therefore, the battery to discharge a depth of 60% -70% of an electric charge the best, according to their own actual conditions to carry out the necessary charge to avoid the harm of sexual charge.

Fifth, to prevent exposure

Electric vehicles is prohibited under the sun exposure.Presario NX9010, Environment temperature is too high will increase the internal pressure of battery automatic pressure limiting valve are forced open, a direct consequence of the loss is to increase cell volume, while the battery is bound to lead to excessive water loss decreased cell activity, accelerating the plate to soften, charging shell body fever, from drums,F4812A, 319411-001, Presario 2100(compaq 2100), Presario 2500(compaq 2500 battery), Presario NX9010, deformation such as a fatal injury.

Sixth, avoid charging out hot plug

Charger output plug loose contact surface oxidation would result in such phenomena as variable charging plug hot, heating time is too long will lead to short-circuit recharging plugs, direct damage to the charger, lead to unnecessary losses. Therefore, the discovery of the above situation, should be cleared or replacement connector oxides.

hp F4809A battery

Notebook battery problem

The most common situation is that the notebook computer using the battery when running at full speed causing too much current and automatic protection. For example, from the CD-ROM disc DVD content will be collected into the mobile hard disk,dell laptop battery, when the host and peripherals are in substantial power consumption, there was a risk that current standards of protection beyond the battery, do not panic when this happens, as long as disconnect peripherals to wait about 10 minutes to reboot.

There is also a common situation is that the notebook computer in the hot environment, 2834T, 4834T

Hp laptop battery
F4098A, F4809A,the use of high-load operation of the battery , so that the ambient temperature combined with its own battery discharge heat generated may exceed the battery protection circuit preset temperature, such a situation especially for high frequency P4 machines in high-temperature environment may occur after high-speed operation. Encountered such a situation should remove the batteries placed in the low temperature places (remember the refrigerator should not frozen!), After half an hour should be back to normal. High-temperature lithium batteries for the damage are relatively large, less than a last resort should avoid high-temperature environment in the high-load use of notebook computers.

BIOS in order to maintain the state, many notebook computers have battery calibration option,2834T, put it simply, this feature will be the notebook computer battery is full and then discharge to the total no electricity, and then filled again, so for a long time did not completely discharge the accumulated error caused by correction has a certain role. However, please note correction in the BIOS in the time spent relatively long, if you do so, preferably before going to bed.

Many models also have in the discharge of the functions of Windows. This can save time,2834T, 4834T

Hp laptop battery
F4098A, F4809A, while working will be corrected. Battery calibration will not be too frequent, frequent deep discharge battery will give are the recommended two to three months time to do it.

Posted by Caroline at 00:41 0 comments Links to this post

13-Feb-2009

Mobile phone battery explosion-proof variable hand grenades Raiders (5)

7, please use the original or the reputation of a good brand chargers, lithium battery charger dedicated,4834T, and follow the instructions, otherwise they will damage the battery, and even dangerous.

8, there are many users often charge a mobile phone when driving, in fact, it will hurt the mobile phone life very easily, because in the charging process, the cell phone circuit boards will be fever, at this time if there are external phone, you may have an instant back to current, on the phone's internal parts damage.

9, battery life determined by the number of repeated charge-discharge, 2834T, 4834T
Hp laptop battery
F4098A, F4809A,it should be avoided as far as possible when more than a rechargeable battery, which will shorten the battery life. Phone off the time more than seven days, first mobile phone batteries should be fully discharged, adequate electricity and then use.

10, cell phone batteries self-discharge exist, not a day when the nickel-hydrogen batteries remaining capacity will be about 1% of discharge,Hp laptop battery, lithium batteries per day will discharge 0.2 to 0.3 percent.

11, to charge the battery as far as possible, using a dedicated outlet, the charger should not be shared with television sets, home appliances outlet.

12, in spite of our mobile phone network coverage in the region, but the phone off charge, we have been unable to accept phone and call the. At this point, we can not use mobile phones pass transfer function, will be transferred to mobile phones around the fixed phone in order to prevent the loss of calls, this method is not for the cell phone network coverage area or weak signals were temporarily unable to get through when they apply.

13, nickel-cadmium (NiCd) batteries must be guaranteed before the battery completely dead,F4098A, after recharging the battery must ensure adequate power.

14, if the mobile phone battery but not been used to place too long, it is best to phone to apply for maintenance departments to make a battery-activated treatment, but also can use a DC barostat, adjust voltage 5-6V, current 500-600mA reverse Connect the battery. Note that touch open up to repeat three times, you can, and after such treatment, the re-use original charger to carry out "2834T, 4834T
Hp laptop battery
F4098A, F4809A,;period of adjustment" charge.

15, the longer the charging time is not good, there is no protection circuit of the battery is full charge should be stopped immediately, otherwise the battery overheating due to heat or impact performance.

16, lithium-ion battery charger must be selected precincts, or may fall short of saturation,F4809A, affect its performance. After charging, should be placed in the charger to avoid the more than 12 hours or more, long-term need not be separated from the battery and cell phone.

Hp laptop battery

The Federal Reserve would get new powers to identify companies considered too big to fail. A proposed new agency to protect financial consumers faces industry opposition.

This is the VOA Special English Economics Report.Hp laptop battery

On Wednesday, President Obama proposed major changes to rebuild government supervision of the financial industry.

BARACK OBAMA: "So today, my administration is proposing a sweeping overhaul of the financial regulatory system, a transformation on a scale not seen since the reforms that followed the Great Depression."

The current economic downturn grew out of a culture of irresponsible lending and borrowing and "a failure of the entire system," he said. He says a new system is needed to meet the speed and complexity of a 21st century global economy.

Treasury Secretary Tim Geithner says the financial crisis developed in part because the existing system let some companies Pavilion dv2000(hp dv2000 battery), HSTNN-LB31, EV088AA, 417066-001
F4486B, shop for the weakest regulator." He discussed the plan before the Senate Banking Committee on Thursday.

One goal is to increase supervision of big companies whose failure could threaten the financial system.Pavilion dv2000(hp dv2000 battery), The Federal Reserve would gain new powers. The central bank would work with a proposed Financial Services Oversight Council to decide which companies are too big to fail.

The idea is to identify troubled companies early. But the Fed would now have to seek permission from the Treasury to carry out emergency lending.

The administration also proposes a new Consumer Financial Protection Agency. It would be responsible for protecting people from unfair and abusive practices with borrowing and investing.

The administration also supports another proposal. Lenders would have to keep 5% of the home loans they would normally group together to sell as securities. The idea is that lenders will be more responsible in making loans if they might not be able to pass off risky mortgages to investors.HSTNN-LB31,

Democratic leaders in Congress say they hope to pass a bill for the president to sign by the end of the year.

Some groups were dissatisfied with the proposals. Insurance companies hoping for simplified rules will continue to deal with different supervisors in every state. And there is almost no effort to combine the numerous federal regulatory agencies into a single financial regulator.

An industry group, the Financial Services Roundtable, says it supports many of the administration's proposals -- but not for a consumer protection agency. It opposes separating the regulation of a company from its products, saying each regulator will only have half the information. Pavilion dv2000(hp dv2000 battery), HSTNN-LB31, EV088AA, 417066-001
F4486B, The industry "does not necessarily need more regulation," it says," but rather more effective regulation."

And that's the VOA Special English Economics Report, written by Mario Ritter. I'm Steve Ember.

Related stories:

Foreign films 'would boost economy'EV088AA,

Obama announces medicare, medicaid savings proposals

US unemployment rate gallops ahead of expectations

US economy slowly improving, challenges remain
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F4486B,
VOICE ONE:

In time Mister Oppenheimer's work in science and teaching made people forget the accusations against him. The government decided to give him the highest award of the Atomic Energy Commission for his work on atomic energy. President Lyndon Johnson presented the honor in late 1963. It was called the Enrico Fermi Award.

J. Robert Oppenheimer died of throat cancer on February 18th, 1967.417066-001, He was 62 years old.

VOICE TWO:

Enrico Fermi had worked with Robert Oppenheimer and other top scientists to develop the atom bomb. He won an award for his work in atomic energy from the Atomic Energy Commission in 1954. It was the first time the award was presented. Later, Pavilion dv2000(hp dv2000 battery), HSTNN-LB31, EV088AA, 417066-001
F4486B, the honor was named for him. It recognized Mister Fermi as one of the greatest physicists of the Twentieth Century.

VOICE ONE:

Enrico Fermi was born in Rome, Italy, on September 29, 1901. After his education in Italy,F4486B, he studied with Max Born in Germany, just as Robert Oppenheimer had.

Enrico Fermi returned to Italy in 1924. He became that nation's first professor of theory of physics. At the time there was almost no physics education offered in Italy

He married Laura Capon, who also was a scientist, in 1928. Laura was Jewish. Later the Fermis decided to leave Italy, because the Fascist government had begun oppressing Jews.

Lithium Batteries

Lithium Batteries

Lithium battery types include lithium-manganese dioxide, lithium-sulfur dioxide, Hp laptop battery,and lithium-thionyl chloride. The anode is composed of lithium and the cathode is composed of manganese dioxide (or sulfur dioxide, or thionyl chloride). The electrolyte of the lithium-manganese dioxide battery is composed of an organic solvent (propylene carbonate and 1,2 dimethoxyethane) solution of lithium perchlorate. In the case of lithium-sulfur dioxide, the electrolyte is also an organic solvent (acetonitrile) solution with lithium bromide. Lithium-thionyl chloride batteries have a non-aqueous thionyl,Pavilion ZE2000(hp ze2000 battery), Presario M2000(compaq m2000 battery), Presario V2000(compaq v2000 battery), pavillion zx5000(hp zx5000 battery), chloride solution containing lithium aluminum chloride. Lithium-sulfur dioxide batteries contain pressurized sulfur dioxide gas and lithium-thionyl chloride batteries contain liquid thionyl chloride which vaporizes upon exposure to air, both of which are highly toxic.

Magnesium Batteries

Magnesium batteries have a magnesium anode, manganese dioxide cathode, and an electrolyte of an aqueous solution of magnesium bromide or magnesium perchlorate. These chemicals can emit highly toxic fumes when heated. If batteries show signs of leakage, proper eye and skin protection is recommended during handling.

Mercury Batteries

Mercury batteries have a zinc anode,Pavilion ZE2000(hp ze2000 battery), mercuric oxide cathode, and an electrolyte of an aqueous solution of potassium hydroxide or sodium hydroxide. The cell has a solid cathode of mercuric oxide and contains 20 to 50 percent mercury or mercuric oxide, by weight. The battery cell contains a caustic electrolyte and can have the same adverse health effects as alkaline batteries.

Nickel-Cadmium Batteries

Nickel-cadmium (ni-cad) batteries have a cadmium anode, nickel oxyhydroxide cathode, and an electrolyte of an aqueous solution of potassium hydroxide. The battery cells typically contain 13-15 percent cadmium and 20-30 percent nickel, by weight. The electrolyte is a caustic solution and is capable of causing the same health effects as alkaline batteries addressed above.

Silver Batteries
Pavilion ZE2000(hp ze2000 battery), Presario M2000(compaq m2000 battery), Presario V2000(compaq v2000 battery), pavillion zx5000(hp zx5000 battery),
Silver batteries have a zinc anode, silver chloride cathode, and an electrolyte of an aqueous solution of lithium chloride or zinc chloride and zinc sulfate.Presario M2000(compaq m2000 battery), The electrolyte is a mild acid (20 to 30 percent by weight) and can cause serious chemical burns to the skin and/or eyes.

Thermal Batteries

Thermal batteries have a calcium anode, calcium chromate cathode, and a solid lithium chloride and potassium chloride electrolyte which are strong oxidizers or caustics capable of causing skin irritation. These batteries may also contain asbestos. If batteries show signs of leakage, proper eye and skin protection is recommended during handling.

The battery manufacturer's Material Safety Data Sheet should always be reviewed for specific environmental and health hazards for the actual battery being used.

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Federal Hazardous Waste Requirements

As a generator of a solid waste,Presario V2000(compaq v2000 battery), the generator is required to make a determination as to whether the solid waste is a hazardous waste. This may be accomplished by applying user knowledge or testing the waste.

Typically, hazardous waste classification is based upon the Resource Conservation and Recovery Act (RCRA) Characteristics of Hazardous Waste. Title 40 Code of Federal Regulations (CFR) Part 261, "Identification and Listing of Hazardous Waste," addresses the four hazardous waste characteristics: ignitability; corrosivity; reactivity; and toxicity. A waste is considered a hazardous waste if it exhibits any one or more of these characteristics. The following criteria are used to make these determinations:

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Ignitability

A solid waste exhibits the characteristic of ignitability (Environmental Protection Agency (EPA) Hazardous Waste Number D001) if a representative sample of the waste has any of the following properties:

It is a liquid and has a flash point of less than 140 degrees Fahrenheit;

It is not a liquid and is capable, under standard temperature and pressure, of causing fire through friction, absorption of moisture, or spontaneous chemical changes and, when ignited, burns so vigorously and persistently that it creates a hazard;

It is an ignitable compressed gas (as defined in Title 40 CFR 173.300); or

It is an oxidizer (as defined in Title 49 CFR 173.151).

Corrosivity,pavillion zx5000(hp zx5000 battery),

A solid waste exhibits the characteristic of corrosivity (EPA Hazardous Waste Number D002) if a representative sample of the waste is aqueous and has a pH less than or equal to 2 or greater than or equal to 12.5

Reactivity

A solid waste exhibits the characteristic of reactivity (EPA Hazardous Waste Number D003) if a representative sample of the waste has any of the following properties:

It is normally unstable and readily undergoes violent changes without detonating;

It reacts violently with water;
Pavilion ZE2000(hp ze2000 battery), Presario M2000(compaq m2000 battery), Presario V2000(compaq v2000 battery), pavillion zx5000(hp zx5000 battery),
It forms potentially explosive mixtures with water;

When mixed with water, it generates toxic gases, vapors, or fumes in a quantity sufficient to present a danger to human health or the environment;

It is a cyanide or sulfide bearing waste which, when exposed to pH conditions between 2 and 12.5, can generate toxic gases, vapors, or fumes in a quantity sufficient to present a danger to human health or the environment; or

It is capable of detonation or explosive decomposition or reaction at standard temperature and pressure.

Federal Hazardous Waste Determinations Batteries

Federal Hazardous Waste Determinations

Batteries (except lead-acid batteries) are not specifically regulated under Federal RCRA regulations. Hp laptop battery,However, many batteries may exhibit one or more of the characteristics of a hazardous waste and require management as such. The following information is provided to assist you in making the proper waste determinations:
Pavilion DV1000(hp dv1000 battery), PF723A, 367759-001, PM579A, Pavilion DV4000(hp dv4000 battery) ,
Alkaline Batteries: Alkaline batteries are not considered a RCRA-regulated hazardous waste. The electrolyte of an alkaline battery does not meet the definition of an aqueous solution or free liquid; therefore, they are not, by definition, a corrosive waste. However, aquatic bioassay analysis conducted (Martin Mariettta, 1992) to further characterize the toxicity of the battery leachates indicates alkaline batteries would be classified as hazardous waste in those states which use bioassay characterization criteria. Your state regulatory authorities should be contacted to obtain a current interpretation.

Carbon-Zinc Batteries: Carbon-zinc batteries are not considered a RCRA-regulated hazardous waste. As with alkaline batteries, these batteries may be subject to state-regulation as a result of bioassay characterization criteria.

Lead-Acid Batteries: Pavilion DV1000(hp dv1000 battery), Lead-acid batteries destined for disposal are considered a RCRA-regulated hazardous waste due to their lead content (EPA Hazardous Waste Number D008).

Lithium Batteries: Lithium batteries are subdivided into the following categories:

Lithium-manganese dioxide batteries are non-hazardous solid wastes;

Lithium-sulfur dioxide batteries (single-cell) are non-hazardous solid wastes;

Lithium-sulfur dioxide batteries (multi-cell) may be non-hazardous solid waste or characteristic hazardous wastes. PF723A, If equipped with a Complete Discharge Device (CDD), the batteries are considered a non-hazardous solid waste after discharging. If not equipped with a CDD, multi-cell lithium-sulfur dioxide batteries are characteristic hazardous wastes due to ignitiability (D001) and reactivity (D003).

Lithium-thionyl chloride batteries (multi-cell) are characteristic hazardous wastes. If these batteries have a CDD, after discharge, these batteries are a characteristic hazardous waste due to toxicity (chromium, D007). Batteries without a CDD are considered a characteristic hazardous waste due to toxicity (chromium D007), ignitability (D001), and reactivity (D003).

Magnesium Batteries: Batteries with 50 percent or greater remaining charge are considered a RCRA-regulated hazardous waste due to the characteristic of toxicity (chromium, EPA Hazardous Waste Number D007). Batteries with less remaining charge are not considered RCRA-regulated hazardous waste. In some cases, the charge may be determined using a Battery Test Set. In those cases where the charge cannot be determined, the batteries should be disposed of as a characteristic hazardous waste.

Pavilion DV1000(hp dv1000 battery), PF723A, 367759-001, PM579A, Pavilion DV4000(hp dv4000 battery) ,

Mercury Batteries: Mercury batteries are considered ,367759-001,a RCRA-regulated hazardous waste due to the characteristic of toxicity (mercury, EPA Hazardous Waste Number D009).

Ni-Cad Batteries: Ni-cad batteries are considered a RCRA-regulated hazardous waste due to the characteristic of toxicity (cadmium, EPA Hazardous Waste Number D006).

Silver Batteries: Silver batteries are considered a RCRA-regulated hazardous waste due to the characteristic of toxicity (silver, EPA Hazardous Waste Number D011, and mercury, EPA Hazardous Waste Number D009).

Thermal Batteries: Thermal batteries are considered a RCRA-regulated hazardous waste due to the characteristic of toxicity (chromium, EPA Hazardous Waste Number D007).

Regulatory Exemptions

RCRA either reduces the regulatory requirements or exempts certain spent solid wastes from regulation if the materials are recycled by use, reuse, or reclamation. In regards to batteries, the following batteries or recycling methods are exempt:

Spent lead-acid batteries that are being reclaimed; PM579A,

Batteries from which precious metals are reclaimed (silver, under the Precious Metals Program);

Batteries returned to the manufacturer for regeneration; or

Batteries managed as universal waste.

On 11 May 1995, the EPA promulgated the Universal Waste Rule codified in Title 40 CFR Part 273. The rule established streamlined management practices for universal wastes and provides relief from the full regulatory aspects of RCRA. Currently, all kinds/types of batteries are covered under the universal waste regulations as long as they are hazardous wastes. The only types of battery exempt from universal waste regulations are lead-acid batteries managed under Title 40 CFR Part 266, Subpart G, "Spent Lead-Acid Batteries Being Reclaimed." Additional information on the Universal Waste Rule is contained in the PRO-ACT Fact Sheet "Universal Waste Rule" (currently under revision).

The Mercury-Containing and Rechargeable Battery Management Act (Battery Act) was signed into law (Public Law PL-104-142) on 13 May 1996. The purpose of this law is to:

Phase out the use of mercury-containing batteries;
Pavilion DV1000(hp dv1000 battery), PF723A, 367759-001, PM579A, Pavilion DV4000(hp dv4000 battery) ,
Provide for the efficient and cost-effective collection and recycling of batteries (lead and cadmium-containing batteries); and

Implement a national, uniform system for labeling batteries. Pavilion DV4000(hp dv4000 battery) ,

Although in general the Universal Waste Rule does not apply in all States, the Battery Act mandates that batteries, covered by the act, be managed in accordance with standards established in the Universal Waste Rule regardless of whether or not other portions of the rule have been adopted. The purpose of this action is to create a consistent program for collection, accumulation, and transportation of batteries nationwide. The EPA has not codified any regulations pertaining to the Battery Act nor established a date for this action.

Battery Recycling Companies

Other Disposal Tips

Battery Recycling Companies

Many batteries can be recycled rather than disposed of as either a solid or hazardous waste.Hp laptop battery, The following is a partial listing of battery recycling companies:

Mercury Refining Company (MERCO), (800) 833-3505. They accept mercury, silver, and carbon-zinc batteries for recycling. They also have agreements with battery recyclers who can process ni-cad and lithium batteries.

Rechargeable Battery Recycling Corporation (RBRC), (540) 720-9225. Presario R3000(compaq r3000 battery), Presario X6000, Pavilion ZV5000(hp zv5000 battery), Pavilion ZV6000(hp zv6000 battery)
They have a contract with the International Metals Reclamation Company Incorporated to recycle ni-cad batteries.

Battery Conservation Technologies, Incorporated, (915) 447-3272. They will recycle alkaline, carbon-zinc, mercury, silver, ni-cad, and lead-acid batteries.

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Sound Management Practices

PRO-ACT suggests coordinating with the following installation organizations prior to disposing or recycling used batteries:

The installation Environmental Management Office to ensure conformance with environmental regulations;

The installation Transportation Office to ensure conformance with transportation regulations;

The servicing DRMO to ensure conformance with DoD polices; Presario R3000(compaq r3000 battery),and,

The base Safety and Bioenvironmental Engineering offices to ensure proper personal protective equipment is available for safe handling.

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General Battery Storage Requirements

Batteries require some care to ensure proper and safe storage. The following suggestions are offered:

Batteries require cool, well ventilated, dry storage areas.

Temperatures should not exceed 130 degrees Fahrenheit.

Protect batteries against being damaged, crushed, punctured, or short-circuited.

Do not smoke or eat in battery storage areas.
Presario R3000(compaq r3000 battery), Presario X6000, Pavilion ZV5000(hp zv5000 battery), Pavilion ZV6000(hp zv6000 battery)

Store batteries separately from other hazardous material.

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Definitions

The following definitions will assist you in understanding battery terminology and making proper waste determinations:

Anode:Presario X6000, The terminal of a battery or cell that releases electrons during the production of any external current; the negative terminal of a primary cell or battery.

Battery: Technically, a combination of two or more cells electrically connected to transform chemical energy into electrical energy. In everyday usage, a single cell such as the one found in a flashlight is also referred to as a battery.

Cathode: The terminal of a battery or cell that accepts electrons during the production of an electric current; the positive terminal of a primary cell or battery.

Cell: A device, which generates electricity, consisting of two different substances placed in an electrolyte.

Dry Cell: A cell, in which the electrolyte exists in a paste and is absorbed in a porous medium, or is otherwise restrained from flowing.

Electrolyte: The conducting medium for the flow of current in a cell.

Non-Rechargeable: A characteristic of a primary battery that can convert chemical energy into electrical energy irreversibly.

Primary Battery: One that can convert chemical energy into electrical energy irreversibly. Pavilion ZV5000(hp zv5000 battery),

Rechargeable: A characteristic of a storage battery that can convert chemical energy into electrical energy and vice versa.

Secondary battery: One that can convert chemical energy into electrical energy and vice versa.

Serviceable Battery: One that can be used for its originally intended purpose.

Storage battery: Same as secondary battery.

Presario R3000(compaq r3000 battery), Presario X6000, Pavilion ZV5000(hp zv5000 battery), Pavilion ZV6000(hp zv6000 battery)

Unserviceable Battery: One that is in such a condition or state that it cannot be used for its originally intended purpose.

Wet Cell: A cell whose electrolyte is in liquid form and free to flow.

Never dispose of batteries in fire, as they could explode. Pavilion ZV6000(hp zv6000 battery)

Remove worn-out batteries from equipment immediately and dispose of promptly.

Do not attempt to recharge a battery unless the battery specifically is marked "rechargeable." Dispose of immediately.







General Purpose & Alkaline Batteries



Alkaline batteries can be safely disposed of with normal household waste. Due to concerns about mercury in the municipal solid waste stream, Duracell has voluntarily eliminated all of the added mercury from its alkaline batteries since 1993 — while maintaining the performance you demand. Our alkaline batteries are composed primarily of common metals — steel, zinc and manganese — and do not pose a health or environmental risk during normal use or disposal.

It is important not to ,Presario R3000(compaq r3000 battery), Presario X6000, Pavilion ZV5000(hp zv5000 battery), Pavilion ZV6000(hp zv6000 battery)
dispose of large amounts of alkaline batteries in a group. Used batteries are often not completely "dead." Grouping used batteries together can bring these "live" batteries into contact with one another, creating safety risks.

Mounting a hard drive on my laptop battery

Mounting a hard drive on my laptop

I got a portable hard drive and ran into an issue of being afraid toEV087AA move my laptop while it was running.  I also almost had it drop while giving a presentation which would have been a very bad thing as it was running 2 virtual machines at the time.  This had to be fixed ASAP.

With about $4 worth of 3M removable poster mounting Velcro, I was able to mount it and remove it if I chose to.  Here are some pictures.

laptop battery

Coming from an ASP.Net and WinForm background, XAML seems like it would be fairly easy to get a handle on but I’m having to take a bit more cautious approach to it.

XAML is XML as is HTML and kind of has some CSS like attributes but at the same time they are different.  For thisEX942AA

reason, I’m taking baby steps to port my old bartending application over.  The first thing I’m going to attack is the button.  Here is the button from the Win32 application.  Yes, I know it looks WPF like but that is just chrome my friend and myself helped paint onto a default Win32 button.

Since I’m a developer, I’ll be using Visual Studio 2008 but Expression Blend will do this far better.

To recreate this in WPF, I have to do a few things to do and a new requirement.  I need an image / XAML glass, text at the bottom, and the new requirement is to have it scale.  With a XAML glass image, I can change the liquid color dynamically along with resize it with no fidelity lose since the image is vector.

The current button (on the right), I have isn’t fully worked out as it can’t import XAML into 337607-003 it but that is just a small issue.  I’ve done this in Silverlight so I know I can do it.

This seems pretty straight forward on how to get everything to work correctly, but let me show you how I did this.  Right now this is pure XAML, no C# or VB.Net exists yet.

For the XAML, I used a Grid, Label, Image and some RowDefinitions to get this worked out.  I can do this since in XAML, I can nest objects within one another’s container.  This lets me put an image / placeholder for XAML and a label within the button so I can extend out the button extremely easily.

1. <Button Name="bigButton" Height="250" Width="250">  


2.     <Grid>  


3.         <Grid.RowDefinitions>  


4.             <RowDefinition Height="*"/>  


5.             <RowDefinition Height="30"/>  


6.         </Grid.RowDefinitions>  


7.         <Image Grid.Row="0" Name="image1"    


8.             Stretch="UniformToFill" Source="Koala.jpg"    


9.             StretchDirection="Both" VerticalAlignment="Center"    


10.             HorizontalAlignment="Center" Margin="10" />  


11.         <Label Grid.Row="1" HorizontalAlignment="Center"    


12.             FontSize="20" Padding="0">test</Label>  


13.     </Grid>  


14. </Button>  

<Button Name="bigButton" Height="250" Width="250">   <Grid>    <Grid.RowDefinitions>     <RowDefinition Height="*"/>     <RowDefinition Height="30"/>    </Grid.RowDefinitions>    <Image Grid.Row="0" Name="image1"      Stretch="UniformToFill" Source="Koala.jpg"      StretchDirection="Both" VerticalAlignment="Center"      HorizontalAlignment="Center" Margin="10" />    <Label Grid.Row="1" HorizontalAlignment="Center"      FontSize="20" Padding="0">test</Label>   </Grid>  </Button>

What this produces (I removed the koala image) PB991A is a grid system that looks like this.  Breaking down the XAML, we see I have 2 rows I defined in the grid.  I have one that is floating and the other is a fixed height of 30.  Then I can say Grid.Row="X" to the element I want to attach to this Row.  In this instance I made the Label to stay at 30 and the Image to take up the rest of the space.  When the button grows or shrinks, the image will be effected, not the text.

Other things I had to do was tweak a bunch of settings on the Image.  I set Stretch to UniformToFill and ScretchDirection to Both along with centering both the vertical and horizontal alignment so when the image grows, it stays centered and in proper proportion.

Up next is dynamically loading and setting a property (or properties) from that XAML!  And PB994A with Expression Blend 3.0, my designer can hand me Illustrator files and I can directly import them in!

how to longth Your Laptop Battery's Life?

Are You Shortening Your Laptop Battery's Life?

One of the concerns that plague laptop owners is whether or not they should make an effort to run down their laptop computer battery to nothing before charging it back up again. Sometimes this just isn't convenient, such as when you shut down your laptop at night and it only has 15 minutes of battery time left. That 15 minutes is certainly not enough to get your through the next day, but if you plus the laptop in to charge it, are you shortening your battery life?

A few moments ago, our resident family of deer had their twice daily walk through our backyard. And there is no baby poo.

These are just some of the reasons I love my laptop.

The brief answer is probably not, although there are PP2182L some considerations to make.

If you have an older laptop that contains a bulky nickel cadmium battery, then by all means drain the power from the battery down to nothing each time. This is because the battery contains memory of a full charge. If you don't drain it, then the next time you charge it up, it will have set a new benchmark for where a full charge is. In other words, it will think it is fully charged when it is not. At a minimum, fully discharge the battery every three months.

Most modern laptops contain the newer lithium ion battery. This battery does not retain a memory, so charging it back up 345027-001when it is not completely drained should not cause too many problems. That said, you should still run the battery down to zero at least every 30 charges or so. This is not to reset the battery, but to reset the fuel gauge on your laptop, that is, the indicator that tells you exactly how much battery life and time you have left on your charge. Running the laptop battery all of the way down to empty helps the fuel gage re-calibrate itself to give you a more accurate reading.

Laptop batteries do need to be replaced eventually, even with proper care, just as car batteries do. After two342661-001 years of daily use, most of it unplugged, I had to replace the battery on my Apple iBook G4, the same laptop I am using right now to write this to you.

Hewlett-Packard (HP) will release a laptop next month

Hewlett-Packard (HP) will release a laptop next month that can run for to 24 hours using a high-capacity battery -- but only if it's running Microsoft's Windows XP operating system.

The long-lasting notebook will be a special configuration of the 6930p, Hp laptop battery,part of HP's EliteBook line that the company targets at businesses.

[ Get the latest on mobile developments with InfoWorld's Mobile Report newsletter. ]

The allure of a battery that can last a day is incontestable, as anyone who has spent time in an airport searching for a power outlet knows. The secret to the 6930p's long battery life is new technology -- and some old technology too.

To get the best battery performance, the 6930p will have to run Windows XP rather than Windows Vista, Microsoft's latest operating system. Vista has been criticized as being a power hog, although some of its flashy, power-draining features such as the translucent Aero windows can be turned off.

Although Microsoft has been heavily pushing Vista, HP has said it will offer downgrades from Vista to Windows XP on business laptops through next year.

The 6930p will also need a 12-cell Ultra-Capacity Battery, which sells for $189. The battery lasts about 10 hours longer than the regular-capacity one.

The new laptop model will also have HP's Illumi-Lite LED (light-emitting diode) display,Pavilion ZD7000, which the company says adds four more hours to a battery's life than a traditional LCD (liquid crystal display) screen.

Further power savings will come from the use of an Intel SSD (solid-state drive), which uses power-saving NAND flash memory rather than a rotating magnetic disk to store information. Use of an Intel SSD enables the battery to last around 7 percent longer, HP said.

HP is one of Intel's partners and will soon being incorporating Intel X25-M and X18M Mainstream SATA SSDs in its products.

HP lists the current available version of the 6930p as starting at $1,199 on its Web site, although the company has not listed how much the 24-hour battery life configuration will cost.

Sony has added its name to a growing list of computer makers recalling laptop PC batteries made by one of its own subsidiaries.

The Tokyo-based company said it will offer replacements for around 90,000 battery packs sold with models of its Vaio PCs in Japan and China. The battery packs have the model names VGP-BPS2B and VGP-BPS3A. PP2182D,The former was used with PCs sold in China while the latter was used in Vaio T-series laptops sold in Japan and in models sold overseas, Sony said in a statement.

Sony is planning to widen the recall to battery packs sold with PCs in other countries but has yet to finalize those details, said Daichi Yamafuji, a spokesman for Sony in Tokyo.

The VGP-BPS2B is used with some models of Vaio AR, FE, FS and SZ-series laptops while the VGP-BPS3A is used with Vaio T-series machines, according to information from Sony and a search of its Web site.

Earlier in the day the Nihon Keizai Shimbun business newspaper said the Sony battery exchange would reach around 300,000 battery 338794-001 ,packs by the time it had been announced worldwide. Sony did not comment on the newspaper report.

With its Tuesday announcement, Sony becomes the seventh company to recall or offer exchanges on laptop PC battery packs. All the batteries include cells made at Sony Energy Tech in Japan. The cells are thought to contain metallic particles, which under certain circumstances could cause a short circuit resulting in the battery catching fire.

The recalls began in mid-August when Dell said 4.1 million batteries shipped with its laptops contained the cells. Within two weeks Apple Computer recalled 1.8 million battery packs. Those two recalls remain the largest of the nine announced by seven companies over the last two months.

In late August Sony said its cost for the recalls would be between ¥20 billion and ¥30 billion ($167 million and $251 million). Earlier Tuesday it said it is considering revising its profits forecast for the year, in part because of the battery recall.PP2182L, Sony is due to announce its half-year earnings next week.

Go out of laptop battery maintenance eight Mistakes chapter two

Go out of laptop battery maintenance eight Mistakes chapter two:

Notebook computer power than mobile phones, the most extreme circumstances, the power needs of Dell D620 battery charging at the same time and running at full speed to meet the required machine power supply, laptop charger compatible with the general no, because Hp laptop battery,the various models of voltage, current, or even interface are different, can be common in a variety of notebook "compatible chargers are" likely to be of genuine more expensive than the charger, even if the same interface, if the voltage and current below the nominal value of machinery, machinery working at full speed when the battery may not be able to obtain sufficient charge current, which damage the battery is a great one.

If the Dell D630 battery charger voltage and current much less than the nominal value, or even find that simply can not boot or will boot but can not be recharged, so choose the best power to choose the time and the same original, it can not be found, please pay attention to a certain voltage and current machines to comply with the nominal values of the different products with the plant in general the same interface, but the voltage and current may be different, F2299A, we must pay attention to this point!

Misunderstanding Six: need fully charged battery (or fully discharger) before store the battery

Or whether it is full-discharge, in fact, F2299A, F3172A, Pavilion ZT1000, Pavilion XZ200, Pavilion ZT1100,is incorrect, put long-term preservation of full-discharge HP DV2000 batteries HP DV1000 battery will lose their activity and even lead to the control circuit protection self-locking and can not re-use, full of power will bring about long-term preservation of the safety problems.

The most the preservation of the ideal way is to discharge to 40% and then save, lithium are afraid humid and high temperature, it should be placed in a cool dry place to preserve, but the temperature not too low, otherwise the capacity will be greatly reduced, about 20 degrees Celsius is an ideal Storage Temperature.

Seven Mistakes: battery dying, but also for its own batteries

The battery is a lot of people for such a deadly,F3172A, manufacturers seem to expect someone to do so long ago, many brands of laptop batteries (as U4873) are designed to have self-locking function, once the batteries from the control circuit, the circuit enters a state of self-locking

Only the use of specific means to be answered, before the control circuit will not work, that is to say the same end-of-life battery, notebook Inspiron e1705 battery batteries can not change the batteries, if you can not have to change batteries, please remember to find the specialized battery maintenance company to wield the sword, its own waste for just small, that after the failure of efforts to frustration and frustration is the worst.

Eight errors: 99% charge has been less than 100%, will continue to charge explosion

Notebook Dell 6400 battery & Dell 6000 battery almost no chance of explosion, the largest is the issue of high fever caused by melting of shell, but few give rise to fire, was released by a small number of incidents, the fact is that when the production technology of non-performing,Pavilion ZT1000, leading to short-circuit in the use of a result, even if Most of this will be short-circuit the battery disconnect circuit protection circuit is not greater damage.

Unless it is in the protection of the circuit before the short-circuit F2299A, F3172A, Pavilion ZT1000, Pavilion XZ200, Pavilion ZT1100,(before the COMPAQ laptop battery explosion is caused by time should be), and such a thing in my notebook a large number of contacts over the past 3 years, have only seen two cases. It is such a thing in cell phones a lot, in the final analysis or the quality of the battery problem, a large number of poor-quality mobile phone battery assembly, and almost never on the laptop's battery did not sell, because there is no owner of a large amount of models that should be compatible battery production.

The reason why 99 percent to less than 100 percent after the charge is often because the record of the battery control circuitry and battery state of their own bias, the latitude D620 battery has not reached the record control circuit voltage,Pavilion XZ200, the power control circuit has been charging the battery in fact has been full of, such problems can usually be corrected through the solution, but even if there is no correction, because the majority of charging circuit will be filled in after a long time can not be disconnected automatically, and even automatically record wise 99% of the current set of 100 %, even the fool has been non-stop design, but also because of the current very small at this time and will not cause harm.

The current laptop batteries are basically the temperature detection circuit, when the Dell XPS M140 battery temperature is too high, most of the control circuit will be forced off the battery to F2299A, F3172A, Pavilion ZT1000, Pavilion XZ200, Pavilion ZT1100,prevent further temperature rise, so this kind of charge to the explosion in the notebook computer battery occurred no less chance of the first prize in the lottery.

No matter how scientific the maintenance measures, the battery will be aging are, like how the magic of cosmetics and beauty maintenance can not prevent the old woman into a maximum of just delaying it, the only way to avoid aging of the battery is not in use (so many people would Select the battery had to), but this 20D battery grip 40D battery Grip laptop but have lost the meaning of the ... ... the battery is always used as the aging time, in fact, is a semi-consumablesPavilion ZT1100,, for almost all notebook manufacturers regardless of the host how long the warranty, the battery in general insurance for one year only.

If you do the maintenance are in place to calculate the weekly use of a inspiron 640m battery, which can accommodate about one year later remained 60% ~ 70% of the capacity of my battery is probably the case, that if it looked increasingly haggard battery is a torture to you, the best way is do not get down and pray or not turn off power plug , or is it a buy as a backup, as long as the battery and notebook in order to bring value and fun enough, I would like to their sacrifices are worth it.

How to Hack a Dead Laptop Battery

How to Hack a Dead Laptop Battery

As far as we know, the new 6 cells laptop battery die after 600-800 charging and discharging circles. Then we spend $80 or more to buy a replacement.Its too expensive, and these dead laptop batteries can pollute our environment if Hp laptop battery,we dropped them random.

New Original Battery $69

Free UPS Shipping on Laptop Battery OEM Original Replacement Batteries

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Portable Performance. ThinkPad T Series Laptops w/ Intel Technology.

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StepsFirst take the dead laptop battery 319411-001, out of your laptop.

Then take the battery apart.

You will see 6 cells connected by wire. Carefully examine every cells by a multimeter to ensure the cells are powerless.

Use a electric welding tool to separate cells from wires. Then take them out of battery shell.

Then welding the new cells together by consulting the dead cells combination and blueprint.

Put the new cells into battery pack and connect the wires and cells.

In the end put the two pieces of battery back together. Cool down it for about 48 hours.

Now hack dead laptop battery complete. You will found that the new battery works again.

TipsGenerally, our "dead laptop battery" is the laptop battery that cant work or cant supply any power. Most "dead laptop battery" are only power exhaust battery but not broken battery. Most accessories of these batteries are good, we can replace the battery cells to hack our laptop battery.

Buy new rechargeable cells

WarningsAlso some strange shape batteries like thinkpad T61 battery and inspiron 6400 battery are the unsuitable hack example.

do everything carefully, as the cells can explode if you strike it hard or the cell is too hot when you weld them.

In all if you are not a DIY expert, don't try to hack dead laptop battery,Presario 2100(compaq 2100), buy a new one is the best choice.

Related wikiHowsHow to Reinstall Windows

How to Recover Data from the Hard Drive of a Dead Laptop

How to Add an Extra Hard Drive

How to Clone a Hard Drive in Windows XP Sources and CitationsTrackback : laptop battery blog

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Replacing a laptop battery? Beware

Ever needed to replace a dying laptop battery? If you do, you'll quickly notice that a large number of the providers offering batteries at below manufacturer cost are based in China, not noted for its standards of consumer protection.

We have had reports of poor quality products turning up from this region so don't assume it won't happen. Here is a guide to avoid being ripped off...

1. When ordering, don't assume a .com or .co.uk website address offers one iota of reliability - country-based web domains are regularly used to give the prospective customer the illusion of locality. Most of these companies are based in Hong Kong or Guangdong, feeding supply from a large number of local clone battery makers.

2. Check the domain owner on whois.Presario 2500(compaq 2500 battery), If it appears to be outside your own country (which it almost certainly will if you are buying from the UK), you should proceed on the basis that you have no consumer protection.

3. Check out the contact email address and payment method. If it is a hotmail, Google mail or Yahoo mail address (i.e not a mail address tied to a domain), take that as a small minus. A serious business will invest in making itself easy to contact.

4. Periods of guarantee vary. Thirty day warranties are often buried in small print, a next to useless period of time given that even poorly manufactured batteries will tend to take between one and two months to show problems in holding charge. Six months should be taken as a minimum guarantee period, a year better still.

One company a reader reported having a problem with is powertoolbattery.co.uk. Product turned up,Presario NX9010, worked for 6 weeks and then died totally. Repeated emails to the company got no response, and the guarantee period is listed as being a hopeless 30 days.

This might have been a one off problem, but the lack of reply to emails, use of a .co.uk domain when the company is based in China, and measly 30 day warranty don't inspire confidence.

My advice is not to buy cheap (a relative term) batteries unless the supplier is a company based in your country of origin. Pay more and get a product that comes with a decent guarantee, preferably not a clone cell from a workshop. Ideally, get one from the company that sold you the laptop. Presario NX9000,They will cost you more in the short run, but will extend the use of a laptop without throwing money down the power drain.