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Renew Your Laptop Battery

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

17 comments

May 3, 2012. 9:28 AMsylvia88 says:

Well done.The battery cell is the critical part of a laptop battery. Your approach is perfect.Maybe we can have a try when we think the price of a new battery is to high for us to afford.thanks for your sharing.

Mar 28, 2012. 8:38 AMxman2 says:

good job

Mar 7, 2011. 5:43 AMAgeingHippy says:

Nice one.

My laptop battery lasts about 3 min so I permanently need to be plugged in.

I might just try your approach.

Thanks

Jul 15, 2011. 3:43 PMehu says:

How did you solder the batteries together? And to the circuit?
Isn't it too dangerous to heat some li-po batteries?

Jun 21, 2011. 9:03 PMlafontas says:

Battery cells from eBay - 18650 3000mAh RECHARGEABLE BATTERY CELL 3.7v Li-ion x8 @ $14.01 with free shipping.

Jun 20, 2011. 11:04 AMBigD145 says:

Some batteries will self destruct if you do this. I remember ThinkPad batteries requiring a 12V current at all times or the circuit would basically shut off and never work. The simple fix was to use a bundle of AA's and hook them up before desoldering the new cells.

Apr 30, 2011. 1:37 AMpithiki says:

My acer L300D laptop shows a red x on my battery. The batery is not all dead.
The laptop can run on the battery for 15min.If i replace the cells in it will it work or do i have a bad smart circuit?

Apr 15, 2011. 7:31 PMzack247 says:

i got a new laptop with a 20 minute battery, i just replaced the cells and i hope it works! note that some battery shells dont even have glue, my gateway battery just had snaps.

also note, that it is highly reccommended that you let the new battery fully charge (without using the laptop) and fully discharge once before you use it as per normal conditions, this helps prime the new cells for the laptop.

Apr 5, 2011. 12:31 AMShagwell73 says:

Where oh where did you get your 18650's for $17 for a set of 8 pray tell???

Apr 2, 2011. 12:12 AMwaqasjamil (author) says:

My Laptop now works for more than 2 hrs when fully charged..but one problem is that the battery cannot be calibrated as the sock one, because each cell has a little variation in voltage..

Mar 13, 2011. 1:01 AMisacco says:

Thanks for this instructable
How much do the lithium-ion cells cost?

Apr 2, 2011. 12:09 AMwaqasjamil (author) says:

its cost me 17 $ for eight cells..

Mar 7, 2011. 7:32 PMrvalotta says:

Fair warning... Most Lion batteries have a max charge rating. once it has been charged that many times it will stop accepting charges.

Mar 7, 2011. 5:50 PMzack247 says:

well my battery lasts about a hour or so but i need to take my laptop with me.
i hope i can find some lithium ion batteries in the stores nearby...

Mar 7, 2011. 11:43 AMScatmanbrandt says:

I have a Clevo D900T with a 12 cell battery, I'm lucky if it lasts 12 seconds on battery power. I've tried opening it before but I might just cut it open like you did with this battery.