I don't want to hijack anyone else's so i figured i'd open my own. I have 168 cycles and my battery is at 87%. I've downloaded all updates, naturally. I'm curious if this would classify as a defective unit. This would be the results after a full cycling of the battery. I'm not sure what the terms are to classify a battery as defective, but being that this is my only computer at this point, I'd really like to ensure I get every ounce of battery life I can get.
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Another battery thread
- Thread starter Mpulsive81
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Check this out: http://www.apple.com/support/macbook_macbookpro/batteryupdate/
Where are you getting the 87% from?
Where are you getting the 87% from?
That's what I was looking for. Now i just need to figure out if they consider 87% a low charge capacity as defined in the link you provided:
"Battery exhibits low charge capacity/runtime when using a fully charged battery with a battery cycle count (as shown in System Profiler) of less than 300. "
I received the 87% from the istat pro widget that came from apple's website.
Just as a comparison, my battery says 98% after 34 cycles.
I'm actually doing a "calibration" (full charge then full discharge) as i type hoping I can get better numbers.
I'm actually doing a "calibration" (full charge then full discharge) as i type hoping I can get better numbers.
i went to the apple store with 30 cycles 92% battery, trying to explain the genius that it actually shows 87% right after calibration. according to him this is normal wear and that he cannot do anything about it. But he did record the issue of short battery life i complained about, and if this continues apple will have to replace the battery for me.
in short, i think that after 160+ cycles your battery appears to be in good condition if it is at 87% wear.
in short, i think that after 160+ cycles your battery appears to be in good condition if it is at 87% wear.
Here's what i'm thinking. If i've lost 13% of my battery life in 164 cycles, i'll be at 74% in another 164 cycles. At a hair over 300 cycles, losing 26% of my battery life is worrysome. I'm not gonna be a brat about it, but i'll go by and see what they say. Or maybe i'll call the apple store and see what they think.
that sounds bad. im at 66 cycles to 92%battery health according to iStat. I suppose i should check system profiler for more accurate results...
The genius bar guy's told me that 85% was normal wear and tear for 110 cycles and 8 months old. But when I called Apple care and told him about my battery issues he just went about getting me a replacement and didn't ask too many questions about it. 
Well I called Apple yesterday and they're sending me a new one. I just had to give them a CC # so they can put a $1 hold on it, just in case i decided to keep both batteries.
Just 1 dollar?? That's awfully cheap for a battery...how would they know whether it's defective or not?
They're not purchasing it back for a dollar, it's a hold they put on my credit card. So lets say I decide I want the new battery and don't wanna send them my old one, they'll have a way to charge me the $129 for a new one. It already qualified for the warrenty replacement over the phone, so it's classified as "defective" already, i don't have to worry about messing with it anymore.