94% with 21 cyles?

Run the calibration again and see what happens.

Also, is it considerably colder where you are now? That could influence the readings as cold Li-Ion batteries won't perform like a warm/room temperature unit.

To me that doesnt seem very good mileage - my just over 1 year old MacBook still has a charge capacity over 100% (5128 mAh) - I think that Coconut Battery looks at the date of manufacture, so if your MacBook sat on a shelf for 3 months - that would be the discrepancy. My battery has just been subjected to normal daily use and carting about - I havent really put any effort into keeping it in good condition - so you may have a dud battery.

seems to be within spec to me.
I would see how it is after another 21 cycles.

I just checked mine and I have 94% with 16 cycles. Age of Mac: 2 months.

Be patient... The data fluctuates. It'll range between 92% and 102% depending on how the battery is reacting. That's all perfectly normal and my PowerBooks and MacBooks all do the same.

im at 39 cycles, and 92%.

ive calibrated once, going to calibrate again soon, and see if it goes up at all.

The battery's still above 80% health. I wouldn't worry about it. Battery's going to degrade, even if you never use it, in fact, if you never use it, it'll die faster.

I'm at 350 cycles on a 5 month old system and my battery health is around 90% to 94%. It jumps at every recharge.

Dont worry about it my friend.

That's not good, but it does fluctuate. See the pictures. In 3 cycles it gained 3%. This battery is from '04 in an '05 PowerBook G4.

brendu said:

im at 39 cycles, and 92%.

ive calibrated once, going to calibrate again soon, and see if it goes up at all.

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pretty weird.... My battery readings too started going for a toss after caliberation.. I am not going to caliberate again.. It ate up one charge cycle and degraded battery health too

it fluctuates a lot. i got mine in november, it has 44 cycles at 93% - but fluctuates from 90% to 96%

srsly, dont worry about it, just continue calibrating ur battery every month

As usual, your battery is perfectly fine.

miles01110 said:

As usual, your battery is perfectly fine.

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I posted in the other battery thread about this so I won't repeat it all. The genius bar folks replaced my battery that was showing similar stats because it was out of spec.

dont worry, istat and coconut battery only give averages and they are not totally correct. plus apple told me that its normal for the % to jump up and down depending on how you charge it etc...

i then had apple run their own battery diagnostic test and my battery is 98.5% after 105 cycles 6 months old. but my istat/coconut usually says 91-96%

lyons238 said:

dont worry, istat and coconut battery only give averages and they are not totally correct. plus apple told me that its normal for the % to jump up and down depending on how you charge it etc...

i then had apple run their own battery diagnostic test and my battery is 98.5% after 105 cycles 6 months old. but my istat/coconut usually says 91-96%

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What battery diagonistic test ?? Do they have some special software. ? Do we have to send out laptop to the apple store or they carry this out over the counter !!!

himanshupant said:

What battery diagonistic test ?? Do they have some special software. ? Do we have to send out laptop to the apple store or they carry this out over the counter !!!

Click to expand...

When I took mine into the Apple store they booted some special hardware test program off an iPod nano.

That doesn't sound right...I'd take in to the geniuses.

they have the diagnostics on their external hard drives right at the genius bar. they told me that they fluctuate, especially in istat/coconut. like i said mine was 94% on istat and their diagnostics read 98.5%,