Laptop batteries, like all rechargeable battery packs, lose their charging capacity over time. Because new laptop batteries are expensive, replacing the individual cells inside the battery casing can save a lot of money. However, rebuilding a battery sometimes does not work as expected, so it’s important to be willing to purchase a new laptop battery if the procedure fails.

1. Allow the laptop battery to run down completely. Turn off your laptop, then remove the battery. Write down the model number located on your Latitude D820 battery to help identify the type of Li-ion replacement cells you need to purchase.

2. Split open a small section of the Latitude D830 battery pack (at the seam) with a screwdriver or craft knife. Continue to pry the plastic case loose moving around the outer edge until the entire top is free. This may take a bit of force.

3. Note the number of cells inside the case (usually four to eight). Write down the part number and voltage information printed on the Toshiba PA3465-1BRS cell casings. Draw a diagram showing the arrangement of the cells and how they are connected, or take a few photos to help with reassembly.

4. Purchase the correct number and type replacement batteries from a local or online dealer, based on your battery model and cell specifications. Six Li-ion cells typically cost around $30 to $40.

5. Carefully remove each cell using a craft knife and wire cutters as necessary. Each Toshiba PA3534u-1brs battery pack is different, but the cells are usually wrapped in a plastic casing with metal contacts attached to one end. Lay the metal contacts, wires and casing material aside.

6. Use double-sided tape or a solder gun (only if necessary) to attach the metal contacts to the cells and circuit board. When finished, the old Dell inspiron 6400 battery cells should be completely stripped (naked) and the new cells should look like the old ones as much as possible.

7. Place the new Discount laptop battery cells inside the case, referring to your diagram or photos if necessary. Glue the battery pack top back on. Charge the new battery for at least 24 hours before using it.

Keep an eye on the new battery while it charges for the first time. If the contacts are not connected properly, the battery could overheat and cause damage to the laptop.

First of all, the test voltage to zero, the machine can not start naturally, can not use power when charging (the battery light does not shine).

Disassemble the battery, more or less talk about the situation inside the battery.

Battery in a total of 9 can be placed 18 millimeters in diameter, length 65 mm core CGH18650 models the location of lithium batteries, Panasonic’s 22 batteries in parallel, three groups of series (OK, then my new Latitude D620 battery, the same, it appears that is 6), there is a very fine control with a single chip – the protection of the circuit, the circuit to the computer a total of five output contacts, respectively, are negative, the clock and data.

First of all, check the sticky in the battery temperature detection probe (temperature resistance), and temperature protection insurance, are also normal. Test-retest the battery voltage of each group, in which two sets of battery voltage of 3.8V, normal; a battery voltage of 0V, appear to have lapsed. The total battery voltage of 7.6V, then the failure of the battery pack has not yet open, then measuring the internal resistance was very small, almost in a state short-circuit.

First of all, failure to deal with Thinkpad T60 batteries, battery repair based on previous experience, the failure of the battery may not be completely damaged, can be activated through a number of methods, in particular the performance of state for the short-circuit the battery. The voltage of the battery to 0 with one end connected to the circuit board off line to avoid damage to circuit boards in operation. Open-circuit battery voltage after the re-survey, is still 0V, ruled out the possibility of short-circuit boards.

For short-circuit the battery failure, the method is more effective high-voltage electric current moment method, using the old IBM power supply (my back-up power), 16V maximum 3A output string on the multimeter (a tributary of the current file 20A), first negative power supply Even with the battery anode, and cathode power multimeter then red table pen, table pen with black multimeter battery cathode touch, speed, faster as far as possible, the former two degrees to see the multimeter has reached close to the 2A (moment) and the third on only 0.4 A about an immediate stop, measure the battery voltage has been restored to about 3V, the internal battery short-circuit that point has been an instant high-current boil (If you do not damage the battery to stop immediately, even if so, battery life and capacity have been the impact, if conditional, or recommend replacement, but if the replacement, then try to replace the entire battery pack are).

However, the batteries need to be a separate charge (if the battery charge of the whole group, this will result in the other two groups had mesenchymal cells), plug in the charger to start charging ammeter to monitor during the charge current to 500mA or so, current for the 3.6AH battery pack is small, but the charger is the charge current is limited and a small current to the xps m1330 battery charge is good for the resumption. After about six hours, the charger showed the battery is already full, continue to re-charge for about two hours, remove the battery, measure voltage has reached 4.2V, with bright halogen bulb in the flashlight (3V, 500mA) to discharge its , bulb sharp discharge current of 700mA, the battery pack that has been basically restored, continue to discharge until the battery voltage down to 3.8V, the purpose of the two groups with the same battery voltage, charging time together so as not to overcharge the Back to the whole battery pack battery circuit welding.

Since the inspiron 6400 battery voltage while the circuit board there is no output, then, surely have damaged circuit boards, after observation, negative input circuit board (take battery) output (then output contact) is directly connected, and the positive input and output of by a high-power thyristor control, the thyristor remains cut-off state, that is, the control circuit has not been output control signals to the SCR control terminal, or simply the SCR has been destroyed. (Measured after the control signals that I did not) because I do not have the ability to repair single-chip microcomputer.

IBM to take into account the protection of the BB more perfect, is about to run out of battery power will automatically shut down when, this battery is intended to be used for entertainment, therefore, need not be too concerned about, so I decided to shake the hp battery protection circuit, directly depend on BB’s protection circuit. SCR is in the input and output pin (that is, cathode circuit board input and output pin) between the solder on a small 2A fuse, fuse 2A select the reason is based on current usage, the largest in the computer power consumption , the current does not exceed 1.9A, 2A capacity sufficient unusual circumstances (for example, short-circuit accident) but also to ensure that the fuse of the time, but also play a role in protection.

In fact, directly to the SCR control terminal so that it can also be a high turn-on, but taking into account the current the battery must be a reason to burn, and the reasons for the identification of protective measures taken before or better in order to avoid greater loss.

Well, the battery power has been the first non-stick, and on the machine to try it! Normal boot, plug in the power immediately after the charge on the flashing lights are up, the way when charging the battery with a random look at battery information management software, was also displayed, the battery circuit board This shows that the single chip is still working.

Batteries battery is a Panasonic, the time the factory in June 2000, the first time in October 2000, the design capacity of 38.88Wh, the current capacity 38.88Wh, is charging cycle: 0 times.

Oh, do not know how to engage in, the inspiron 1300 battery may be burned when burning confused, even cycles to the zero, Now it maybe a new battery.

There are many laptop battery in the electronic market, a large number of substandard products into the market, including many original batteries counterfeit, take many potential to consumers. For non-professional consumers, we suggest the customer select the notebook battery following to the next tips:

1. Check packaging
Battery packaging should be sealed anti-static bags, anti-static foam lining, which is to protect the basic configuration of the VGP-BPS5 notebook battery.

Battery packaging should have a bar code serial code. Bar code is provided by the factory management of commodity standards to identify the authority logo.

2.check the appearance
Batteries should not be scratched or the appearance of the old sense, or readily available second-hand goods renovation as OEM satellite A100 battery.
Battery case should be clear parameters, performance, application of model identification.
Joints up and down the VGP-BPS5A battery cover should have no marks have been opened.

3. Check the official commitment to the protection of that and after-sale

Formal professional laptop battery grade qualified products cylindrical latitude d800 batteries, since the date of the factory, there are bonds for one year warranty. If you can not have this commitment, then the use of batteries and other materials may not be the quality of very qualified sub-grade batteries but batteries. At present the market with large number of obsolete Japan, South Korea and the poor laptop battery conversion, this product may seem cheap products are actually huge profits, as well as the normal use of notebook computers much damage, the explosion will be serious personal injury caused to consumers.

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I. Technical Overview

Fuel Cell (Fuel Cell) working principle is very simple, chemical Shui through electrolysis to generate hydrogen and oxygen, fuel cells and vice versa, is the production of water by combining hydrogen and oxygen, releasing energy at the same time. Hydrogen fuel cells is the main material consumption, and some directly to bring hydrogen fuel cells, the use of aluminum high pressure cylinders. Methanol or gasoline also make useful materials, through re-engineering technology to generate hydrogen.

A variety of fuel cell so that the reaction of hydrogen and oxygen conditions and in different ways, including proton exchange membrane (PEM) fuel cell with low temperature (70 ℃), suitable for use in electric vehicles. Proton exchange membrane coated with precious metal catalyst, can produce hydrogen and oxygen ions through the membrane into water, and generate electricity. In the electrochemical reaction in a battery voltage of only 1V generated, it should be composed of hundreds of pieces of the battery pack to generate electricity KW-class and as a driving force of motor vehicles.

Second, the status quo and development trend of domestic and foreign
The world’s industrialized countries have fuel cells as an important strategic objective, dumping huge amounts of money for research, the United States, Canada, Germany, Japan, the cost of their study are hundreds of millions of dollars. At present, proton exchange membrane fuel cell bus trial in the vessels and, but the high prices is the fuel of vehicles 5 to 10 times.

By further reducing the cost to improve reliability, before and after 2003 a large number of applications in the car.
Only those domestic colleges and universities, Now sony is have been researching for the fuel cells. scientific research units have just begun a pilot study, compared with foreign investment is very small, only in this strategic area of the level of follow-up study abroad.