About Battery..

is me or late 2011/early 2012 13" macbook pro battery runs fast not being on charger? i've realized when i'm on youtube or not being on youtube. having tabs open such as: mac rumors, facebook, tumblr , email. runs being 4hrs30minutes or 1hrs/2hrs hours 50 minutes left. i'm not worried noticed now.

 

adobe flash player cpu intensive, more power needed feed cpu, results in higher temperatures , higher fan speed(s) on mobile computers. more power used due flash, battery life of mobile computers shortened bit.
check, if adobe flash player responsible less battery time or heat, go applications / utilities / activity monitor , select show processes , sort cpu.

there variety of flash blockers 4 major browsers available.
flash blocker says, blocks flash content, via click on marked flash object, flash object can activated , used.

• safari: clicktoflash, there extension , plug-in; ctf allows download youtube , other kinds of mpeg-4 encoded video too.
• opera: has built-in flash blocker
• firefox: flashblock add-on block flash
• chrome: flashblock extension block flash

make sure have latest adobe flash player version running, can here.​

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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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this should answer most, if not all, of battery questions:
apple notebook battery faq by ggjstudios
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