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Battery underwhelming.

A Hobo

A Hobo

macrumors 6502
Original poster
Jul 12, 2010
376
228
Somewhere between Here and There
I just picked up a "new" late 2011 17 macbook pro.
(brand new in box at least)
and i noticed that the max battery mah is only 8950, on my 2009 mbp 17 it was something like 12000/13000,
Now i have a spare 2009 battery in storage, I bought it just in case and is still on about 3 cycles. Can I put that battery into my new macbook to leverage longer battery life?
has anyone done the same?
 
...

No, if the battery is smaller its still filling the whole space inside the case and they made it smaller because the system draws less power.
 
LiIon batteries lose capacity over time. It's possible that the "new" MBP has simply sat on the shelf long enough that the battery has lost some capacity. The same could be said for your 2009 battery that you've been holding on to.

If you'd like to make sure the battery lasts as long as possible, you ought to read through this.

http://www.apple.com/batteries/notebooks.html
 
T5BRICK said:
LiIon batteries lose capacity over time. It's possible that the "new" MBP has simply sat on the shelf long enough that the battery has lost some capacity. The same could be said for your 2009 battery that you've been holding on to.

If you'd like to make sure the battery lasts as long as possible, you ought to read through this.

http://www.apple.com/batteries/notebooks.html
Click to expand...


It only had 1 cycle when I opened it, could it really have lost nearly 4000mAh by being on a shelf? Can anyone else chime in with the max mAh of their i7 17 batteries?
i downloaded coconut battery and it listed the Max for this notebook as 8450 (which i have somehow exceeded? see attached)


Edit: i have also noticed that coconut battery is reporting my mac as being 22 months old, it is about 12 months old at the moment so there is some weirdness there. (from manufacture i mean, its 3 days old from purchase; its an apple refurb)
 

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Last edited:
Something is wrong with that battery. It should 12000-13000 mAh for the design capacity.

I'd contact Apple if you just bought this computer.
 
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