Dell Lithium Ion Battery

[widow_twanky]

The battery on my Dell laptop died recently and had to be replaced. As it was a lithium Ion pack I thought I'd take it apart and have a look.

The cells were configured in a 3s3p configuration. I checked the individual cell voltages and six of them are reading about 4.1v the other three are at about 0.2v hence why it's died.

Now, this appears higher than i would expect from an a123 cell which i understand to have a cell voltage of 3.6v.

I have the stuff to charge these and balance them but i was wondering if these are suitable for use in a featherweight?

Andy

[typhoon_driver]

The cells in a laptop battery aren't A123s they are lithium ion (lipo). A bit confusing but basically the internal chemistry is different hense the difference voltages even though they are both technically lithium batteries.

You are allowed to use Lipo's in featherweights yes but I certainly wouldn't advise using laptop batteries. They are designed to be used in a low discharge capacity ie running a laptop for a long time requiring an amp or two. If you try and discharge them quickly chances are they will catch fire. It may be spectacular, it may not but either way I wouldn't bother. Just take them along to your local battery recycling center and hand them in.

[widow_twanky]

The cells in a laptop battery aren't A123s they are lithium ion (lipo). A bit confusing but basically the internal chemistry is different hense the difference voltages even though they are both technically lithium batteries.

You are allowed to use Lipo's in featherweights yes but I certainly wouldn't advise using laptop batteries. They are designed to be used in a low discharge capacity ie running a laptop for a long time requiring an amp or two. If you try and discharge them quickly chances are they will catch fire. It may be spectacular, it may not but either way I wouldn't bother. Just take them along to your local battery recycling center and hand them in.

That'll explain it then. Just that they are in a 'can' which as you say is slightly confusing.

Andy

[woody]

http://www.engadget.com/2005/06/28/how- ... p-battery/

[widow_twanky]

http://www.engadget.com/2005/06/28/h...aptop-battery/

They

[muchalucha]

all lion cells arent they? Never seen a round lipo cell before so i think there probably lion cells in the battery pack as ive never seen a lipo laptop battery apart from in those chinese 7 inch unbarnded win ce netbooks.