Ultrabay Slim LiPolymer

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stapol · #1 Post by **stapol** » Tue Jul 13, 2004 5:03 pm

Thinkpad t42p always uses Ultrabay Slim LiPolymer first for powering this laptop. After Ultrabay Slim LiPolymer got 0%, then thinkpad use the main battery which is Li-Ion 6 cell batery.
I heard it is not good for Li-ion battery to completely discharge. But I never heard about LiPolymer battery.

Is it ok for Ultrabay Slim LiPolymer to discharge completely (to 0 %) on t42p ?

Thx U

Voodle · #2 Post by **Voodle** » Tue Jul 13, 2004 5:10 pm

Not really, the li-polymer battery works the same as a regular li-ion battery but can be made smaller because it doesn't need so much packaging. I always though that the drain to 0% was a bad idea on IBM's part, you should pull the li-polymer battery out at about 5%, otherwise it'll lose capacity like my ultrabay 2000 battery did, barely 20 cycles and it's down to 32Wh from 38Wh.

I reckon it's a conspiracy on IBM's part, since those batteries cost so much. If IBM cared about keeping things functioning as long as possible, they'd use a proper battery sharing setup like some dells do where the batteries drain fairly evenly.

stapol · #3 Post by **stapol** » Tue Jul 13, 2004 7:51 pm

Thx U

One more think ... I cant charge full my new 6 cell battery. It's stuck 98 % and has zero cycle ont it. Is it normal ? What can I do to make it is 100 % again ?
Thx again .....

JaimitoBond · #4 Post by **JaimitoBond** » Tue Jul 13, 2004 8:53 pm

It stops charging when the battery is already around 95%+ or so. If you drain it below that, say to 80%, it should be able to charge it continuously to 100%.

sonyc · #5 Post by **sonyc** » Tue Jul 13, 2004 11:34 pm

what does cycle mean?

Leon · #6 Post by **Leon** » Wed Jul 14, 2004 12:18 am

cycle is the equivalent of 1 full discharge/charge

Ultrabay Slim LiPolymer

Ultrabay Slim LiPolymer

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