Weird or Not?


macrumors 6502a
Original poster
May 15, 2007
I was trying to calibrate my computer and checking on coconut battery. i was waiting and when it reached 0 mah it would turn off and i would leave it alone. it kept going down and check this picture.

also is this a normal battery delcine (73 cycles with %85 health)



macrumors 604
Jun 27, 2006
Seattle, WA
MacBook Pro batteries are pretty bad IMO, mines already down to 75% capacity with less than 50 load cycles. You might be able to get Apple to replace it, I have gotten a battery replacement from them before.


macrumors regular
Apr 24, 2007
Melbourne City, VIC, Australia
It does seem a little weird..

My MBP battery drops by 1% almost once every charge cycle. It's only been charged about a few times and it's down to 97%. I don't want to have to buy myself a new battery next year... :confused:


macrumors 6502
May 9, 2007
My battery health seem to fluctuate somewhat. Right now I'm on 37 cycles and 91% health in iStat Pro.

Coconut Battery seems to have a fixed setting for original battery capacity where as iStat Pro takes a reading of the actual capacity the first time iStat Pro is used.

Getting a little off topic now: So I'm at 91% health in iStat Pro, but 100% in Coconut battery... To me it seems like iStat Pro shows the correct health but Coconut battery shows some nice numbers(battery capacity in mAh)

On topic:

Battery health fluctuates somewhat. I've seen mine go from 90-ish to 98% when I ran on battery for some time and then recharged the battery.


macrumors 6502a
May 20, 2007
Lithium-ion in general are bad, you lose something like 20% per year, I don't know if that is during best or worse conditions thought.