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Eraserhead

macrumors G4
Original poster
Nov 3, 2005
10,434
12,250
UK
It seems from this thread that a lot of people are asking questions about whether their battery needs replacement. I think its worth improving the Mac Guide on this to make it clear. But to do so I need to know the maximum battery capacity of a selection of Macs which can be found with Coconut battery.


Please post the original capacity for your Mac below with the Model as well.

Picture 12.png

I'll start with the MacBook 13": 5200mAh.

EDIT: Please include the screen size otherwise the data can't be used
 

zephead

macrumors 68000
Apr 27, 2006
1,574
9
in your pants
For some reason, CoconutBattery mistakenly reports that MacBooks have a 5020 mAh capacity when in reality they're 5200 mAh. I noticed this when I upgraded to Leopard and noticed my original capacity had dropped to 5020, so I changed it in the CB prefs.
 

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Eraserhead

macrumors G4
Original poster
Nov 3, 2005
10,434
12,250
UK
Nice catch, fortunately I remembered it was 5200 and didn't notice what it actually said :).
 

Abstract

macrumors Penryn
Dec 27, 2002
24,835
847
Location Location Location
If the battery needs replacing, you'll know. Capacity decreases of lithium ion batteries decrease very slowly, but after 2 or 3 years, or a certain number of charge cycles (around 300, on average), battery life will just start free-falling until you get less than 1 hour per full charge. This sudden drop from "good" battery life, to a miniscule battery life will happen within a span of several months. Once you start seeing this accelerated drop in battery life, you need to start thinking about getting a new battery. Otherwise, your battery will have little capacity in several months.

Is that enough information?
 

Eraserhead

macrumors G4
Original poster
Nov 3, 2005
10,434
12,250
UK
^^ Yeah, but that won't stop the threads, <shrug> it seems useful to have the figures for people to compare.
 

Eraserhead

macrumors G4
Original poster
Nov 3, 2005
10,434
12,250
UK
I've added the MacBook Pro 15" and MacBook 13.3" figures of 5200 and 5500 mAh, the others I've calculated manually, as I believe 2100 is way too low for the iBook when Apple claim they have similar battery capacity to the PowerBook's.
 

Eraserhead

macrumors G4
Original poster
Nov 3, 2005
10,434
12,250
UK
^^ I've checked again and that's what my MacBook apparently gets and its in ratio with the figures on Apple.com
 

m.d.

macrumors newbie
Jan 24, 2007
18
0
Scotland
Thought I'd share this: I last posted here on May 17th, with my 17" PowerBook getting 1517 mAh; just ran CoconutBattery again, got the following results:
 

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Eraserhead

macrumors G4
Original poster
Nov 3, 2005
10,434
12,250
UK
^^ Its normal for it to fluctuate. But what I was looking for was the original capacity not the final capacity.
 

AJ1BostonMASS

macrumors member
Apr 22, 2008
86
0
White Macbook 2.4Ghz

Current Cap-5118

Original Cap-5020
100%

15 cycles

5 weeks old :D

what i did was made sure my battery was completely dead before i plugged it in to charge and that could be why its better
 

tmjcpdsm

macrumors newbie
Aug 11, 2008
1
0
my battery almost down : normal ?

hello mine is low (see attach)
moreover, it seems that it varies (last week it showed 48 % instead of 67!)

i need to change it?

i have a macbookpro 1.83 ghz intel, 2Go 667 Mhz DDR2, OSX.4.11
 

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