Macbook Pro Battery Health

[Inconsequential]

Mines at 45 cycles.

Between 0 and 30 it was 98%+

30 and 40 it dropped to between 67-72%

Now its crept up to 98% at 45 cycles...

Weirdness!

 

[Mack1N]

bought mine @ aug07

 

[johata3]

i currently have the mbp unibody.

so far it has only went thorugh 12 cycles. i've noticed how my battery health went down to 99%. i know it will survive but this means that it wont' go back up to 100% now?

 

[gnomeisland]

You have all given me hope!

I thought I was the only one with these problems. I LOVED my Penryn MBP for the amazing battery life when I got it--in fact I fail to see the appeal (aside form aesthetics) to the new, bigger, heavier uni-bodies. Then my battery started dying. Calibrating just made it worse and now I'm at less than 3500mhA! I can't remember when exactly I got the laptop but I'm around 7-8 months.

I'm lazy and I don't really want to visit one of the three (four) apple stores here in NYC but I it sounds faster than waiting on hold. Thanks for your help!

 

[applevinci]

3 weeks old MBP Unibody 2,53

 

[johata3]

So I assume that the battery health will not go back to 100% now?

 

[applevinci]

Now I have 95%... wtf?

 

[ucsdmac]

Penryn 15' MBP: 235 cycles and current health is 81%. I get less than 2 hours with screen on full brightness. I believe thats normal for the amount of cycles but I'm still not happy with it.

 

[jon08]

My MBP Penryn is about 1 month old, and has 10 cycles and 97% health battery!! Isn't that weird??

 

[johata3]

weird but my battery health went back up to 99%. before it was 97. i guess the calibration worked!

 

[noodle654]

I just got my battery replaced by Apple..just waiting for it come. My battery was anywhere from 88-99%. It was running fine until one day it dropped to 38%. I calibrated and reset the SMC and it went back up. I then unplugged it and it dropped down to now 27%. I couldnt get it to come back up and I just gave up. I called Apple and they said that its defective and they are now replacing it for free

 

[daneoni]

It was at 99 until yesterday. Hopefully it goes back

 

[caissie1]

Mine is at 26% health with 203 cycles. Gonna go to the future shop tomorow and see if i can get a new one. I do have a garranty so im hoping it will cover it!

 

[jf0517]

Something to watch is using bootcamp with another os while on your battery. Since you are not i os x it wont be monitoring the battery and when you reboot it will see that so much charge has just disappeared. The other day i was using windows for specific class then changed back os x afterword without recharging. After doing so my battery health was at about 60% with 25 cycles. But after recharging and fulling using the battery in os x only for a couple times the health has crept back up to the high 90%.

 

[flipmodesquad]

i came to this forum as my battery health had dropped from >90% to 74% within 24h. i unplugged it just an hour ago, when the battery was at 21% - and when i unplugged it, it instantly dropped to 4%. that's how i noticed the battery health was @ 74% (iStatPro). however, after plugging it back in, leaving it for half an hour (being used tho), and i then unplugged it, the battery health kicked back to 92% and the battery charged actually increased (just by unplugging) from 20% to 34%...

so it seems to me to be some kind of problem with the reading of the battery health/charge - and perhaps indeed calibration is a good way to go forward. (as it seems it's not just iStatPro that gets confused, but os x as well.)

 

[Blondie :)]

For Those of you wondering why your MB or MBP seems to drop so far when you calibrate it, the same thing happens to me every time too. I think it has something to do with the fact that Li-ion batteries aren't supposed to be fully discharged often. So, when you do calibrate them, it takes more of a wear on the battery. Every time I calibrate my battery, it fluctuates down to around 86-88%, and then slowly goes back up to in between 93-94% as time wears on and I use the battery a bit more.