New MBP, Coconut battery says 94% capacity

[tigress666]

Ok, I know I wasn't going to get the 10 hours that Apple brags, but I was kinda hoping it would at least be 6-7.

So I decided to finally test the battery today (I did calibrate it by powering it to full, draining the battery, and after more than 5 hours rest i charged it to full again, using it during time).

First it shocked me but then I rememberd I had Sims 3 (just got it today) running in the background and I remember some one saying that game sux battery (it has anywhere from 1-3 hours to play Sims). So I turned it off. Right now battery is at 85%, with brightness to half, wifi on, using Firefox and terminal, and it's telling me anywhere from 4 hours 20 minutes to (right now) it said 5 hours (it does tend to change).

Oh, and how much life it tells me it has jumps around a lot. Like 2 minutes ago it was saying 5 hours, a few minutes before that it was saying 4 hours and 23 minutes. And now I just turned off bluetooth and it went to four hours 20 minutes.

So I checked what cocout battery said and it told me I had 94% capacity on this battery (I mean the battery is supposedly now only able to do 94% of its capacity).

Do you think maybe I calibrated it wrong? I let it drain while I was at work so I wasn't sure when it went off so I waited five hours after I got back from work to plug it in and use it again. And anytime it was powered in I used it (the instructions said I could).

Or should I be worried?

 

[Bill Gates]

What did you do to fully drain the battery? Typically the MBP just goes to sleep after a set period of inactivity.

 

[tigress666]

What did you do to fully drain the battery? Typically the MBP just goes to sleep after a set period of inactivity.

Uh, I let it stay on with wifi (it was on for more than 10 hours by the time I got home and it would not wake up so I assumed I had gotten to the point I needed it to be). And I think I told it not to go to sleep at all in the settings (though I did say it could turn off display cause it freaked me out about saying that was bad for the display).

 

[Bill Gates]

It sounds like you calibrated it correctly. 94% does sound a little low, but give it a week or so of use and see if that number changes for the better. If not I would say you have cause enough for Apple to replace the battery.

 

[530farm]

after calibrating mine, and checking coconut battery mine was at around 97% w/ only 2 cycles on the battery. FOr somereason now it is at 100% w/ 6 cycles. I would use it a little more and check again later.

 

[Madin]

same thing happend here.
As it turns out the capacity readings tent to fluctuate.
Take a look at the screenshot. Went down to 94% two times already but came back to (near) 100%. Right now, it seems to stay at well above 100%.

Keep an eye on it and just enjoy your MBP

 

[blackwind]

Same here. Brand new out the box (fully charge) then install coconutbattery.
11 Cycle on it. with 7weeks old. and 94% only..

After I've done 2 battery Calibrations. It shows 100%

Cheers