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Discussion in 'MacBook Pro' started by Pagga, Jul 6, 2012.
After 3 load cycles, the capacity is seemingly rising ...
Current = 8729 mAh
Design = 8460 mAh
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.
This should answer most, if not all, of your battery questions:
Apple Notebook Battery FAQ
It'll even out after a while..
Coconut battery is an excellent, tiny program that reads both your battery capacity and the age of your mac, number of load cycles et ceterea.
Download here if you don´t have it:
Be aware that coconutBattery has had accuracy issues, especially with the age reading. An alternative is iStat Pro, which tracks a lot more than just battery, including temperatures, fan speeds, drive, CPU and memory usage, etc.
Thanks. Very similar to battery health but in search of the best one I settled with the iStat Menu.. Really nice! They have a trial for 14 days..
I thought apple mentioned that the new generation batteries don't need cycle charging? i.e. max capacity from the word go...?
They don't need calibration. They have maximum capacity when they're new. The capacity reading will fluctuate both up and down over time, but will ultimately decline over time. The Battery FAQ has more details.
They don't need calibration ever? Every few months?
The built-in batteries in the newer Mac unibody notebooks come pre-calibrated and do not require regular calibration like the removable batteries. Calibration has no effect on your battery's health; it only served to make the battery readings more accurate in older Macs.
I get this now:
Anyone know why it says 103%?
Because it can hold 3% more plutonium than it was designed to do.
Because its programmed to do a simple arithmetic calculation. 8735/8460 x 100 = 103% rounded
my retina current capacity just dropped big time down to 94% now 92% only 80 cycles. wow. image retention and bad battery life. great
Because measuring and worry about this is a huge waste of time.
That was answered 4 months ago in the first response to this thread.
Read the 2nd post of this thread.
Is it advisable to discharge the battery (15 inch Mac Retina) on a regular basis? Or can I basically leave the Mac plugged in at all time without worrying about the capacity and health of the battery?
Run on battery whenever you need to and plug it in whenever you can. You can plug or unplug any time you need to, regardless of the charged percentage, and you never need to completely drain your battery. Just make sure you don't run on AC power exclusively, as your battery needs to be used regularly to stay healthy.
If you haven't already done so, I highly recommend you take the time to read the Apple Notebook Battery FAQ in the 2nd post of this thread.
Not at all. It's quite normal.
so, what is up with this?
Battery has been seemingly poor, dying in about 4-4.5 hours. normal wifi, I graphics, just web and email.
Why would the battery capacity show 8199, when design capacity is 8460?
Most people here seem to show higher numbers, not lower numbers.
cycle count is 4, which is accurate since I have owned it.
Read the BATTERY LIFE section of the Battery FAQ linked in post #2 of this thread.
Read post #2 of this thread.
Most people have 100% or less. A few who have posted here had over 100%, but that won't last.