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iBook Battery Capacity

Message #1 - Posted 2003/12/16 - Mikey

After upgrading to 10.2.8 - I can't recall any other milestone - my 600 MHz 14" iBook's battery suddenly lost most of it's capacity. I researched the problem the usual way, and found a lot of info on osxhints.com. Seems like there's a lot of info on it once you start looking, naturally. Lots of advice on PMU and PRAM resets, stuff like that.

Using some terminal scripts and X-battery, I found that I had a battery capacity of about 0.98 amp-hours. This was way lower than anyone else had reported in forums; maybe a half-hour from full charge to the low-power warning.

This morning I ignored the warning and went all the way down to complete loss of power , save for the pulsing sleep lite. After pluggin in, the capacity was suddenly 1.95 A-h. Quite the improvment.

Anybody else got any similar tales, or advice? I think my Apple Care is still good, but I'd prefer to find out why my capacity dropped. I usually work plugged-in, and only go off the charger occasionally.

Message #2 - Posted 2004/08/17 - Mikey

Hi all. I got a new iBook battery from Apple for free (AppleCare, natch) a couple months back. My batt had almost exactly 4.000 Ah capacity. Now it's got about 3.2 Ah. Is this kind of dropoff normal? Or is it sinking fast..? TIA.

Mike

No sig, no neuroses

Message #3 - Posted 2004/08/17 - Bob Harris

Previously, Mikey wrote:

Hi all. I got a new iBook battery from Apple for free (AppleCare, natch) a couple months back. My batt had almost exactly 4.000 Ah capacity. Now it's got about 3.2 Ah. Is this kind of dropoff normal? Or is it sinking fast..? TIA.

Mike

Have you read the Apple battery web page?

http://www.apple.com/batteries/

or

http://www.bateryuniversity.com/

Bob Harris

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