IStat Pro Battery Health

Hi everyone. So ever since I updated my firmware for the supposed sleep issues and such, I actually have been having issues with my battery. I now get an occasional cycle where my battery only gets about an hour of use and on my iStat Pro, I have a 68% battery health rating. Then after charging the computer I usually get back to the normal 3 hour battery life that I have and I get a 98% rating from iStat. I calibrate the battery at least once a week since I use my computer a lot and I'm on my 90th cycle (not really that much).
My two questions are these: Should I put any stock into this battery health rating from iStat since usually after a "bad cycle" I get back into the 90s? Also, is there any fix for the firmware update or has anyone figured out a method to fix these issues?
Thanks all in advance.

I have the same problem with my battery (though i never had it as low as 68%). I don't think it's a problem with iStat but with the Power Managing Unit (don't take my word for it though). iStat simply says how the current amount of full charge capacity compares with what should be the optimum full charge capacity. So basically, the problem lies where your computer interprets the full charge capacity of the battery.
I tried loads of things (including resetting the PMU and doing some hard-core calibration) but none worked.

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islayer.com states...
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racazu wrote:
The "Genius" there told me that because I do not let my battery die every time I use my laptop
That's the worst advice someone can give you. You don't have to let your computer run out of battery or you will damage more the battery. Instead, I recommend to make full cycles (discharge the battery, put it to charge when you consider necessary and charge it fully).
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As Steve Ar said, both can vary a bit.
My MBP (see attached image from Cononut Battery Monitor,
This can be downloaded from macupdate.com)
My MBP has been powered constantly for the last few day, but has dropped to 95%. It does this to prevent the "constant use" of the recharge circuits, and will recharge itself to 100% when it drops below 95%. Also the max charge is more than design, but will not stay at that max charge ... it will change a litlle even rising fromover 7000 mAh occasionally.
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When did you buy it?
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Exitio\'s Apple wrote:
Can Apple replace my macbook pro (mid 2012) retina's battery if I think that the battery health has gone bad/in need of and renewal???
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Full cycle? 100%, of course.
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Hi all, hope you can give me some advice.
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Genius Bar reservation:
http://www.apple.com/retail/geniusbar/
Best.

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Willtc92 wrote:
Ive had my 13 inch macbook pro for less than 30 days and the battery health has gone down to 92% and the computer itself is so slow...i paid $50.00 for an OLD windows computer with 512 mb of ram and it is much faster..is this normal for mac??
obviously not.
Ive had my 13 inch macbook pro for less than 30 days and the battery health has gone down to 92% and the computer itself is so slow...
Give examples of how it is slow.

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That is not unusual. Note that the actual maximum charge is well above the designed level which is the most important criteria.
Ciao.

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Hi
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Thanks

If it is running 10.7.5, I'm not surprised. Any MacBook Pro gotten last month should at minimum have had 10.8 something if not 10.9 something, unless you bought it refurbished or used.

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why not just use your macbook as it is until the service battery messages shows up.
i have 2010 Macbook Pro with 913 cycle count - 84% Battery Health and I still get almost 5 hours of normal use.
See image below.

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Message was edited by: david.moore

I installed Snow Leopard as well (made a clean install) and got the same message "check the battery". I followed the procedure on http://support.apple.com/kb/HT1490, since I had the same problem (my battery capacity was significantly low compared to the cycles, I had ~2800 mAh (60%) for only 60 cycles) and when I rebooted the computer, it even dropped down to ~2095 mAh (40%) !! *So the good advice is to _NOT follow HT1490_ advice...*
I tried as well http://support.apple.com/kb/HT1411 but it didn't helped...
I guess I'll have to take a meeting at Genius Bar to the closest Apple store... Did anyone got his battery replaced ? I think this is one serious issue where Apple should either :
1. Remove this bad advice's page and warn users against it
2. Upgrade the battery's firmware (is there any?) or OS battery life detection
Anyway it's very annoying that when doing a "recommended" manipulation, it even makes the problem worse !!

IStat Pro Battery Health

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