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krnjason

macrumors newbie
Original poster
Jun 1, 2008
7
0
i just bought my mbp about a month ago and a couple weeks i noticed that when its pluged in from the power adapter, the battery would ALWAYS linger around 97-99% never 100 even tho its plugged in. and to reach 100, i would have to unplug and manually drain the battery a bit to fill it back up to 100.

Now, when i plug it in its at 99% then when i unplug it, it miraculously goes back to 100% huh? this doesnt make sense to me. you think i should go to the apple store for a replacement battery?

the warranties covers for 90days right? i dont have the apple care plan.
 

atluten

macrumors 6502
Mar 24, 2008
263
0
The laptop discharges the battery a little even if the computer is plugged into an adaptor so it conditions the battery. It usually just lets the battery go down a few percent but charging the battery back up to 100% then letting it discharge back down again. This might explain what you're seeing.
 
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