[darkhero168]

Does completley draining a new battery improve it's longevity in a macbook? and is it bad to run the computer till the battery is completley dead

[reader50]

So far as I know, new PowerMac or MacPro batteries are not compatible with the MacBook. Is there a particular reason why you need to use a desktop Mac battery in a MacBook?

Since the motherboard batteries in desktop Macs are not rechargeable, the answer is 'no' - draining them will greatly reduce their theoretical longevity in a MacBook.

ps - this means you should post MacBook questions in the MacBook Forum, as per our posting rules.

[mduell]

Completely draining it is a good way to figure out what it's capacity is, but in general it's bad to completely drain lithium batteries. Doing it once for calibration is a good idea, but don't do it every time.

[darkhero168]

thanks mduell.

and reader50.. this post was originally posted in the macbook forums. someone had moved it here.