94% with 21 cyles?

[presence06]

New macbook, maybe 4 weeks old?

Battery claims to be 4months old and I've only drained the battery once to "calibrate" it otherwise kept it around 20% (at lowest)


this is what Coconut is showing me after 21 cycles.

[NewMacbookPlz]

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.

[presence06]

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.

Right now I having it sitting on my desk in the basement. It's cool down here but not freezing/cold. I can tell the desk (wood) is a cool.

Is that bad for the battery?

[chrismacguy]

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.

[skubish]

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

[m0no]

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

[Vashed555]

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.

[presence06]

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.

Well good. I used it lastnight and let the MacBook die. I will recharge it answer but I guess from what you guys are saying it's not that big of a deal. Thanks guys.

[presence06]

After 26 cycles, coconut and Istat shows 93%...

[brendu]

im at 39 cycles, and 92%.

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

[ayeying]

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.

[dmmcintyre3]

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.
http://att.macrumors.com/attachment.php?attachmentid=200668&stc=1&thumb=1&d=1256669827http://att.macrumors.com/attachment.php?attachmentid=201403&stc=1&thumb=1&d=1257110285

[himanshupant]

im at 39 cycles, and 92%.

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

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

[halisray]

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

[miles01110]

As usual, your battery is perfectly fine.

[ulbador]

As usual, your battery is perfectly fine.

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.

[lyons238]

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%

[himanshupant]

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%



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 !!!

[ulbador]

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 !!!

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

[noah82]

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

[lyons238]

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%,