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2

I've never been concerned with such a small measurement error. I'd be interested in seeing more data. If you make a month's measurements at least daily - please post and share. Perhaps something is concerning but the small fluctuation you report isn't concerning to me.


2

That's an option to enable : Settings > General > Usage > Battery Percentage


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Avast free Mac Security does somewhat drain battery life. However, despite the disadvantages, I strongly suggest that you use it. I own a Macbook Pro Retina 2014 running OS X Yosemite and Avast has blocked 5+ web threats. I also use Avast to scan files from unknown sources and to scan files shuttled from USB sticks. From my experience, Avast lowers the ...


1

You can find these options in System Preferences > Energy Saver. Drag the "Computer Sleep:" slider to the left. Note that for newer Apple portables, Yosemite combines the sleep and display sleep option: http://forums.macrumors.com/threads/2013-mba-no-computer-sleep-setting-wtf-heres-why.1598329/


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Yes with time you can do like Ender says, or simply do it directly by clicking on the Apple on the top-left corner and click Suspend Activity (Go in sleeping mode)


1

Lithium cells degrade over time so getting a new cell is always better three years shelf life or worse. Worse, if the part falls into deep discharge, it will be ruined. I have no issue with old batteries but I charge them up to 50% every 6 months to avoid deep discharge. When you can get a cell that you know was put into long term storage properly, then buy ...



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