MB Pro battery life question

dragonstryke

macrumors newbie
Original poster
Oct 5, 2011
5
0
Hey guys I bought a MBP 10 months ago (according the the info on the mb) and as of today istatpro says that my battery health is at 84% and I have 91 cycles.

This was my first apple notebook and I was just wondering if this is a bad battery or not and what are users on this forum getting out of their batteries.

Also, if it is a bad battery can I go into an apple store and have them replace the battery under warranty?
 

miles01110

macrumors Core
Jul 24, 2006
19,261
31
The Ivory Tower (I'm not coming down)
Seems a little low to me. You can take it in, but be aware that:

1) Batteries are not covered by Applecare. However, underperforming batteries are often replaced for free.
2) The Genius will run Apple's diagnostic tools on your machine. iStatPro metrics do not hold any water.

Take it in; you don't have anything to lose.
 

happle

macrumors 6502a
Jun 20, 2010
501
0
hows 79-80% @ 431 cycles and 2 years old? think apple would replace it for free or?
 

mgartner0622

macrumors 65816
Jun 6, 2010
1,018
0
Colorado, USA
hows 79-80% @ 431 cycles and 2 years old? think apple would replace it for free or?
Apple generally regards batteries as "consumables" meaning that once they are used past a certain point they are consumed. This point is usually about 300 charge cycles.

OP, To qualify for a new battery I was told by a genius that you need to have a reasonable amount of charge cycles (<300) and have a battery health of under 80%. All that the genius bar diagnostic really does is test your battery to see if it falls within these guidelines.
 

GGJstudios

macrumors Westmere
May 16, 2008
44,421
770
Batteries are covered under warranty if they are defective.

iStat Pro accurately reports the battery health, as shown in System Profiler. However, that health is an estimate that isn't 100% accurate.

Batteries are expected to retain up to 80% health for up to 1000 cycles. If they fail to meet that expectation, they may be considered defective. Take it to Apple if it drops below 80%. If it's above 80%, it's rare that they would consider a battery defective.

This should answer most, if not all, of your battery questions:
 
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dragonstryke

macrumors newbie
Original poster
Oct 5, 2011
5
0
thanks for your replies! I dont have applecare but there should be a 1 year manufacturer warranty right?

What I'm worried about is that it wont drop below 80% in 2 months time.
 
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