Apple will do it for you for a fee. Be careful about installing a third-party battery, as it could cause damage. Maybe if you find an OEM Apple battery, it would work ok, but apple doesn't sell them directly.
Apple will do it for you for a fee. Be careful about installing a third-party battery, as it could cause damage. Maybe if you find an OEM Apple battery, it would work ok, but apple doesn't sell them directly.
No, it's based on how much of the design capacity your battery is holding at 100%.
For example, my 2010 13" battery originally had 5770mAh when new, it now holds around 80% of that when it's fully charged. My status is still 'good'. I have 382 charge cycles.
For a while when Mavericks first came out, the OS was reporting mine as lower than that and the status was 'replace soon'. As soon as they fixed things in the OS it has now gone back up and is Good.