Rebuilding a laptop battery?

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Creebo
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Rebuilding a laptop battery?

Post by Creebo » Wed Oct 26, 2011 1:20 am

I'm doing a project with a laptop, but the battery is dead. Now the new case I'm putting it in has way more space than the previous one, so I was wondering if I could rebuild the battery following the instructions here. Also, could I do, I don't know, 3.6v cells at 2200mAh to give this a little bit of better battery life? Or could I just wire up more batteries in parallel to achieve better battery life? As I said, there's quite a bit of space in here.

Thanks!

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Re: Rebuilding a laptop battery?

Post by Haunted360 » Wed Oct 26, 2011 1:45 am

Swap the cells over EXACTLY the same. Never go higher in voltage, or lower. The only thing you may go higher in, are the milliamps.

If there are 7 ni-cad cells at 400 mah each, you MUST replace them with 7 ni-cad cells at 400 or greater milliamps.

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Re: Rebuilding a laptop battery?

Post by Creebo » Wed Oct 26, 2011 1:50 am

As long at the voltage (in my case 10.8v) is the same, I could use any combination of voltage/current of cells right? What I remember from physics was cell in series = increased voltage, cells in parallel = increased current. Could I do 2x7.2v cells at 2200mAh, and 2x3.6v cells at 2200mAh? Or is it bad practice? I'm seeing if I understand you properly :)

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Re: Rebuilding a laptop battery?

Post by Haunted360 » Thu Oct 27, 2011 8:26 am

Hmm... That reply is a little confusing.
Current and Voltage are the same thing, but when or not active.
http://www.kpsec.freeuk.com/voltage.htm


Batteries in series, increase voltage.
Batteries in parallel, increases amps.


What does the label on your current battery read?

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