battery vs AC cable

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Zweibel · #1 Post by **Zweibel** » Mon Jan 08, 2007 1:51 pm

Is it true that leaving the AC cable plugged in all the time will - over time - reduce battery time?
Is it better to fully charge and then unplug the AC cable?
Thanks a lo for you rhelp.

Zweibel

EOMtp · #2 Post by **EOMtp** » Mon Jan 08, 2007 2:14 pm

What you state is true in general for charging batteries. However, the Thinkpad's charging circuitry turns off charging when preset limits have been reached. Consequently, one may leave a Thinkpad connected to a plugged-in AC adapter with no ill effects for the battery.

pianowizard · #3 Post by **pianowizard** » Mon Jan 08, 2007 7:03 pm

Zweibel wrote:Is it better to fully charge and then unplug the AC cable?

Nope. In fact, that's the worst thing to do for the battery's health, because you want to use the battery as infrequently as possible. Just leave the battery in the laptop and keep the laptop plugged in.

creed_mty · #4 Post by **creed_mty** » Tue Jan 09, 2007 1:14 am

EOMtp wrote:What you state is true in general for charging batteries. However, the Thinkpad's charging circuitry turns off charging when preset limits have been reached. Consequently, one may leave a Thinkpad connected to a plugged-in AC adapter with no ill effects for the battery.

I was thinking about that, well my lappy is on the way. So, the charging circuity in a thinkpad will not overcharge the battery only when needed and called like "safe" way on battery health??
because i will have it sitting for long time on my desk & i rarely go somewhere like hotspot with it and i like to have my lappy ready at any time to go mobile with friends.

pinesol · #5 Post by **pinesol** » Tue Jan 09, 2007 1:16 pm

I've also read about rejuvenating Thinkpad batteries on this forum.

I suppose what was said above does not apply to rejuvenation, does it?

battery vs AC cable

battery vs AC cable

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