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My macbook air 2011 Battery health 93% ?
- Thread starter Derpao
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92% after 69 cycles and about 4 months having it. Not very impressed (it's the third MBA I own and definitely the one that dropped the fastest).
I tried to reset PRAM but didn't succeed, is it working on 2011 MBA ?
I'll let it drain completely and charge it to 100% a couple of times to see if it gets better...
I tried to reset PRAM but didn't succeed, is it working on 2011 MBA ?
I'll let it drain completely and charge it to 100% a couple of times to see if it gets better...
It is perfectly normal if your battery health (maximum capacity) is more or less than 100%, even when brand new, or if it fluctuates up or down over time. For further details, read the CHECKING STATUS AND HEALTH section of the following link.
PRAM/NVRAM has nothing to do with battery/power/charging issues. Resetting it will not help.
There is no need to fully drain and recharge your battery. It will not affect the health and will only use up cycles needlessly. If you think by doing so you're calibrating (that isn't the way to do it, anyway), the built-in batteries in the newer Mac unibody notebooks come pre-calibrated and do not require regular calibration like the removable batteries in older Apple notebooks.
This should answer most, if not all, of your battery/charging questions:
My Macbook Air 2011 13' is pretty new. I've had it since April 2012. Anyway, it fluctuates between 94% and 98% up and down no matter what I do. Seriously, no matter what I do. I can drain it to 50%, charge it back up, keep it plugged in and it will fluctuate from 94% to 98%.
Now? I got rid of the battery % indicator and just started using my laptop not giving a **** about what the battery health and just enjoying my laptop.
A month of practicing this and I can finally enjoy my laptop. I don't feel like I'm murdering baby kittens every time I use my laptop when it isn't plugged in and I can focus more on reading, writing, and doing.
93%? I'd be cool with that. If you're checking it every day you should see it fluctuate throughout the week. Once I left my laptop in my trunk and it got warm and the battery said 99% - was happy for a day. lol. If it was like 85% I'd be worried for a new laptop. But anything north of 90% it can't be bad.
$100 to replace the battery? I don't worry anymore about the battery. I'm going to USE the laptop and enjoy it. (Yes, I paid Dell $140+ for 85wh batteries back in the day so $100 is nothing...).
The reality is, after 5 months of usage .... I have 28 cycles - I'll be buying a new Macbook before this battery is anywhere NEAR 80% and 1000 cycles.
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People need to listen to this guy.... Lithium Ion Batteries do NOT need discharged below 50% and they do not need calibration. They do need "exercised" to keep things going. If this is news then do yourself a favor and google: Battery University Lithium Ion Battery. Here's the link: http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
Now? I got rid of the battery % indicator and just started using my laptop not giving a **** about what the battery health and just enjoying my laptop.
A month of practicing this and I can finally enjoy my laptop. I don't feel like I'm murdering baby kittens every time I use my laptop when it isn't plugged in and I can focus more on reading, writing, and doing.
93%? I'd be cool with that. If you're checking it every day you should see it fluctuate throughout the week. Once I left my laptop in my trunk and it got warm and the battery said 99% - was happy for a day. lol. If it was like 85% I'd be worried for a new laptop. But anything north of 90% it can't be bad.
$100 to replace the battery? I don't worry anymore about the battery. I'm going to USE the laptop and enjoy it. (Yes, I paid Dell $140+ for 85wh batteries back in the day so $100 is nothing...).
The reality is, after 5 months of usage .... I have 28 cycles - I'll be buying a new Macbook before this battery is anywhere NEAR 80% and 1000 cycles.
----------
People need to listen to this guy.... Lithium Ion Batteries do NOT need discharged below 50% and they do not need calibration. They do need "exercised" to keep things going. If this is news then do yourself a favor and google: Battery University Lithium Ion Battery. Here's the link: http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries