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battery question.

jeffuwee

jeffuwee

macrumors member
Original poster
Aug 31, 2008
74
0
hi i was just wondering: if my macbook is plugged in then does it use the battery power while it simultaneously charges it? or does it directly use power from the plugged in power source and not use the battery at all. i was wondering cause i read a lot of threads where if you use your macbook battery for a certain number of cycles the battery life goes down dramatically. i was hoping that if for the majority of my ownership i have it plugged in i could avoid this problem. thanks for any replies!
 
ah okay that's what i needed to know. so best way is to just plug it in at all times right?
 
When the processor is at full use, it's possible for the computer to require more power than provided by the power adapter which would cause the computer to supplement with the battery.
 
oh really? i can just take out the battery? say if i was using it at home i could just use a coin open it up and take it out? would it still be okay?
 
If you take out the battery your processor will be slowed down to half speed to avoid using more power can be supplied by the power adapter. Quite simply, leaving the battery in while it's plugged in will not hurt the battery. All batteries go bad eventually, but there is no wear and tear from just having it in the laptop with the charger connected.
 
I'd like to add too that having your battery in saves you from sudden power outages wreaking havoc on your unsaved documents and hard drive. Personally, I accidentally yank out the magsafe connector two or three times a day, which would all result in lost work if I didn't have a battery in...
 
ab2650 said:
I'd like to add too that having your battery in saves you from sudden power outages wreaking havoc on your unsaved documents and hard drive. Personally, I accidentally yank out the magsafe connector two or three times a day, which would all result in lost work if I didn't have a battery in...
Click to expand...

Yea I was gonna say that. I NEED my batter in for those times that it accidentally becomes unplugged and because I'm constantly plugging in/unplugging the MacBook to move it into another room.
 
alphaod said:
When the processor is at full use, it's possible for the computer to require more power than provided by the power adapter which would cause the computer to supplement with the battery.
Click to expand...
No.

The computer will never draw more current than the power adapter can supply.
 
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