You will need
- - screwdriver;
- - multimeter;
- - the cyan-acrylate glue.
First, determine the type of battery used in your laptop. Usually it is a Nickel metal hydride (older models) or lithium-ion (relatively new) items. To do this, visit the website of the manufacturer of the mobile computer. Sometimes it contains information about the methods of recovery of the battery by using the utility built into the BIOS.
If to revive the battery using the program is impossible, remove the battery from the laptop previously unplugging it from the mains. Disassemble the battery and remove all items from the unit.
When working with Nickel metal hydride batteries using these steps. Separate from each other all the batteries. There may be more than ten pieces. Prepare a few light bulbs. It is better to use a car bulb (21 watts). Solder the wires to them and connect one lamp to each battery. Leave the device for about 10 hours. It is necessary to completely discharge the batteries.
Now load all the elements. You can use the power supply of the mobile computer and the aforementioned lamp. Connect the bulb to the batteries in series and connect the battery with the charging block of a laptop. Repeat the cycle of discharge and charge elements 2 more times. After that, collect the battery and connect it to the laptop.
When working with lithium-ion batteries, you will need the cyan-acrylate glue. Without it you will not be able to connect the elements after recovery. Be sure to fully discharge the battery. Remove all batteries from the case and carefully detach the interconnected units. They usually consist of two or three batteries. To do this you have to unsolder the metal plate connecting the battery.
Measure the voltage of each element. If it is significantly below 3.7 V, the unit will need to be replaced. Using 5-Watt lamps lower the voltage of each cell up to 3.1 V. This same procedure be done with new batteries. Assemble the battery, insert it into the laptop and connect the charger.