Macbook Air mid 2012 Battery Health

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hello guys. have macbook air mid 2012, battery has 304 cycles , health goes 84-85%.

haven't tested battery see in real life how performs keep plugged in of time.

there can improve battery health? find 85% bit low 300± cycles.

, question - should use mavericks or yosemite better battery life? running yosemite.

thank
 

attached files:

cycles isn't import thing. age, type of battery, usage pattern etc decides. fact, can tell having plugged in of time more damage exercising rutinely.
 

attached files:



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