The new 6-cell laptop batteries die after around 600-800 charging cycles, after which you have to spend around € 60 to order a replacement. It is a nice cost, and if these batteries are not disposed of correctly they can also pollute the environment.
Steps
Step 1. Disconnect the battery from the laptop
There should be two tabs: slide them to unlock them, then slide the battery out.
Step 2. Open the battery
To do this you will need to arm yourself with a lot of patience and a flat screwdriver or butter knife.
Step 3. You will see 6-8 cells connected to the circuit board
This is the battery control unit. Look near the connector to find the board and trace the cables. Carefully examine each cell with a multimeter to make sure each is completely discharged.
Step 4. Write down the wiring diagram
This is a very important step.
Step 5. Use a pointed electric soldering iron to separate the cells from the wires
Take them out of the case.
Step 6. Now weld the new cells together using the connection diagram you noted in step 4
Step 7. Slip the new cells into the case
Solder the cells and cables.
Step 8. Put both rows of cells back together
Let it rest for about 48 hours.
Step 9. Your hack is complete
Insert the battery and start charging. Turn on your computer and you're done!
Advice
- Cells can explode if soldered directly to other cells, so it's best to ask the seller if they can add solder tabs specifically for you.
- Buy new rechargeable cells; eBay is a good place to look for them.
- In general, a dead battery cannot provide even a minimum of power. Most apparently bad batteries are nothing more than uncalibrated batteries, and you just need to calibrate them to get them back in good condition.
Warnings
- Warning: Some battery packs have strange shapes, such as the Thinkpad T61 and Inspiron 6400 batteries.
- Always pay close attention. The cells can explode if they get too hot during welding or if they take hits.
- If you are not an expert in this kind of work, the best choice for you is to buy a new battery.
