Mac Battery Issues

about 2 days ago, @ 100% mac battery last 5 hours. yesterday, @ 100%, battery said estimated last time 2 hours.
tried calibrating battery , morning said battery last 5 hours again @ 100% when dropped 98%, went down 2 hours again. i've been using computer little more do, not point believe battery drain out quickly.

should bring mac apple store or there can battery?

 

battery time depends on cpu usage, watching flash videos or playing flash games example cpu intensive.

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have @ activity monitor (applications / utilities /) , select all processes , sort cpu see culprit may be.
check "system memory" tab see "page ins:", "page outs:" , "swap used:" are.

image below uses sorting cpu example

further reading:

mac os x: reading system memory usage in activity monitor
making of activity monitor
what activity monitor (or how take mac's pulse)​

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learn more mac os x:

helpful information mac user by ggjstudios​

 

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