So I got a battery from a friend of mine for pretty cheap. He used it a little, but it was still supposed to be a "new" battery.
When I compared it to my original (and still used) battery, however (which is 3.5-4 years old now) it's "health" is lower than my old battery!
I calibrated both using the recommended procedure of putting it on battery power, then using it until it forces sleep. Then charge it up fully. After these calibrations the batteries read like the following:
New battery: Cycles 50, health 81% (~3500-3600 mAh)
Old Battery: Cycles ~260, health 90% (~3800-3900 mAh)
The old battery is a model 1078, and the new battery is a model 1148. Thinking there might be some difference between them, I followed the "new Powerbook calibration" procedures wherein you let the computer force into sleep, then let it sit for an additional 5 hours to completely drain the battery.
Well- it's been over a day since the laptop forced itself into sleep, and still the little white pulsating light is going. I am beginning to think that this isn't right, because my laptop isn't one of those new ones it is a 1.3GHz PB (not the latest one with the dual layer superdrive). The apple website says to calibrate batteries on my powerbook by just letting it go to sleep, then recharging. But I thought that since the battery was the newer 1148, maybe it needed to be calibrated the "new" way.
What do you think, should I let it keep going until it actually dies? Or just charge it up now? I feel like that since ti has been going for so long on sleep now though indicates that there is a lot of capacity left over that could be factored into the battery life, hence the "low" health reading.
Ruahrc
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