View Full Version : Battery Health 55%

Dec 26, 2008, 10:54 PM
I got my MBA in mid February. My battery health is down to 55%, after 186 charging cycles. My full charge capacity is down to 2816 mAh, from the original 5200 mAh. The condition is listed as "Check battery." I did a calibration last night, which didn't help anything. Is this normal? Anyone else have similar figures?

Dec 26, 2008, 11:07 PM
Not sure about the batteries of MBAs, but that seems very abnormal. You should be over 80% battery under 300 cycles. That is Apple's warranty.

Dec 26, 2008, 11:50 PM
Ouch that's brutal.

I have 145 cycles and i'm still at 96%. I do a calibration about every month or two. Gen 1 btw. Also i find that every once in a while it will dip to as low as 93% but that keeping it on the charger for a day or so straight brings it right back up. Goodluck!

Dec 27, 2008, 12:13 AM
I will bring it in to the Apple Store. Maybe I will get a new battery under warranty.

Dec 27, 2008, 07:34 AM
How do you do the Calibration?

Dec 27, 2008, 07:41 AM
New Battery - it is faulty! :)

Dec 27, 2008, 10:10 AM
How do you do the Calibration?


Dec 28, 2008, 07:39 PM
Battery is now 100%. I just got back from the Apple store. They replaced my battery under warranty. Their diagnostics program immediately showed a problem with my battery.

Cole Slaw
Dec 28, 2008, 07:42 PM
I've had batteries go prematurely bad like that a couple of times in the past, and Apple has always been very good about replacing them under warranty.

Dec 28, 2008, 07:54 PM
^ Yea, I remember during the "Sony's Exploding Battery" era in 2006 or so, Apple called me about getting my battery exchanged since most iBook G4s had the Sony battery that was overheating and blowing up on people. In fact, my battery wasn't defected but still Apple bothered to call me. That is quality service, I was also out of AppleCare too, being over 1 year.

Dec 28, 2008, 09:00 PM
Sorry this is late but yea something is wrong with your battery.

Here are mines.