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Old 10-08-2003, 09:09 AM   #1 (permalink)
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Battery usage

Hi everybody! I just got my first laptop , an IBM R40.
I m mostly using the laptop at home so far.So i was wondering since im always near a plug if i should take out the battery and use only the AC power.Is that appropriate or i should just continue to charge and discharge the battery?
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Old 10-08-2003, 04:57 PM   #2 (permalink)
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If you are always near a plug why wouldn't you just plug it in instead of using the battery?

It does not hurt it to leave the battery in the laptop while it's plugged in. I have heard IBM actually suggests this with some of their models.
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Old 10-09-2003, 07:18 PM   #3 (permalink)
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This is interesting as there seems to be alot of different opinions. I remember when Nickel Cadium was the big thing, really the only thing; it was always suggested you remove the batteries/pack from the charger once complete. Otherwise the battery would start to discharge and it would ultimately shorten the life of the battery.

With Lithium Ion, most manufacturers suggest you leave the device on the charger unless you need to take it off. LIO is much more advanced and the charging system can power off once the battery is fully charged. Also, one of the supposed advantages of LIO is that you can charge the battery without doing a full discharge. I doubt this somewhat as I've had cell phone batteries die prematurely from what I felt was constant charging w/o discharging fully.

Personally, I leave my home laptops on the charger while using them and only take them off when I switch rooms. The only thing that I've noticed is that when I don't use them for a day or two, I find that the battery is at about 85% when I take it off the charger. That's simply because once the battery is charged, the charger powers down, and the battery goes through its natural discharge.
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Old 10-09-2003, 09:16 PM   #4 (permalink)
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Quote:
Also, one of the supposed advantages of LIO is that you can charge the battery without doing a full discharge.
This is correct. The deeper you dischare a LiIon battery the worse the performance gets.
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