View Full Version : iBook G4 brand new battery drops too fast?

Nov 8, 2005, 10:31 AM

Yesterday I got my new replacement battery for my iBook G4 (the 933 Mhz model from later 2003). My first battery died fast, at about 210 cycles. I used my iBook most ot the time plugged, I still can't understand what the 'cycles' exactly mean.

The thing is I got a new battery yesterday, and followed precisely Apple instructions in order to calibrate my battery:


While I was performing the initial charge, and the following full discharge, in System Profiler and Coconut Battery I learned my battery had an original capacity of 4400 mAh, and 0 cycles. When fully charged, it completed those 440 mAh. Then I discharged until the warning and then sleep came.

While performing the third step of the calibration (the second full charge), I noticed my battery's capacity dropped from 4400 mAh to 4263 mAh, and that I already have one cycle. The thing about the cycle was absolutely clear, but the significant drop of capacity surprised me. From 4400 to 4263 means my battery now has only 96% of it's original capacity. This happens just one day after new.

Is this normal?

Thank you,

Nov 8, 2005, 11:02 AM
Is this normal?

Thank you,Absolutely not. Return that battery. Something's not right.

Nov 8, 2005, 01:05 PM
http://forums.macrumors.com/showthread.php?t=158947&highlight=coconut gives a bit of information - it looks like an average loss per cycle is around 5 to 6 mAh. Yours has lost 137 mAh in one cycle, apparently. It might just be what happens on the first cycle, but it doesn't look good.

Nov 9, 2005, 03:22 AM
Try calibrating the battery, as in depleting it until the iBook sleep's and then fully charge it, maybe this will solve the problems,