Renew Your Laptop Battery





Introduction: Renew Your Laptop Battery

Change Your Laptop Battery cells instead of buying expensive new battery...

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If the battery is a 2100 mhA can i use new 18650 cells of 4000mhA? will not change the output?


It will only last longer, but make sure it has the same physical size, should be the same if both are 18650s.

Hi I've replaced cells of my 8-10 year old Fujitsu laptop with cheep cells but only got the same lifespan (45min tops). After re-soldering the pack and even replacing the original set of cells the laptop now alternates between 99% charged and 0% capacity continuously every 3 seconds or so and shuts down immediately once the AC power is shut down.

Could I have damaged the battery circuit?

If the battery is a 2100 mhA can i use new 18650 cells of 4000mhA? will not change the output?

It's a bit late, but for anyone else wondering, there are no (true) 4000 mAh cells yet. The highest at time of writing is 3500 mAh. Anything claiming higher is a total fake.

As long as the voltage is the same as the old batteries, you'll be ok.

Excellent! Giving this a shot right now! Just what I needed...thanks!

This is a waste of money and time. I replaced my toshiba battery with new cells but buttery itself doesn't identify new cells. The problem is there is a microchip in battery which has the details of the battery. To reset the battery you have to reset the values on EEPROM of battery too. If you can find a datasheet of the MCU you maybe able to reset it by grounding the RESET| pin. Be causes!!!. Otherwise you have to use be2works software and GPIO cable. But you will not find it for free on internet. Best option is to go for a duplicate battery on ebay and replace the cells with orginal s3 battery before using it.

How can i define which kind of cell i need to replace my dead cell of my laptop battery? My product is "Dell Vostro 1540 6 Cell battery". 4400 mAh, 6 cell.

There is no mention of volt, mAh rate on the cell.

Also please tell me where from can I buy and collect these cells? My local store doesn't hav these.