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Mid 2009 モデル番号A1278 / 2.26、2.53 GHz Core 2 DuoプロセッサーEMC 2326

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My battery doesn't last for very long

I hope someone can help me. My battery was draining very quickly so I bought a new one from this website.

However, the battery still drains really quickly. Even though the 'battery time remaining' in the information when I click at the top might say 2 or 3 hours, it will never last longer than about an hour.

Even if it is on 100% and I shut the lid, by the time I get back to the laptop a few hours later it will have lost a significant amount of battery despite not being used.

I've tried to reset the PRAM and recalibrate the battery but it doesn't seem to have done the job.

Any suggestions would be most grateful.

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Sounds like you have something (process) running in background which is chewing on you battery.

First look under your account to see what you have setup as a start up item. Next make sure you have shutdown all of your open apps. Also make sure if you have any add on's running on your menu bar shut them down as well.

So at this point you should only have the core OS processes running. Making sure your battery is fully charged open up Activity Monitor and review these Apple T/N's Use Activity Monitor on your Mac and this one Apps can affect Mac performance, battery runtime, temperature, and fan activity. See what is running that shouldn't. Do be careful! You don't want to kill off needed services. The trick is to see what folder the file sits in if its one of Apple's it will have it in its path name.

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I would also recommend you do a SMC reset. Follow this Apple T/N Reset the System Management Controller (SMC) on your Mac to make sure your new batteries values are know vs you old battery.

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I would suggest the same as Dan says. Hold the Shift-Control-Option on the left side of the keyboard

for at least 10 seconds otherwise it doesn't work.

If this doesn't help, check the symptoms for the MagSafe DC-In Board.

Maybe that is your problem.

Very important, you don't say which system you are running. When I installed Yosemite or El Capitan, it was going onto Icloud all the the time, wasting bandwidth and energy. My internet access is metered here in Costa Rica so I dumped the 'improved' systems and reinstalled 10.8.5.

Result: more battery, less waste of internet and better performance altogether.

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I know this is a very typical answer, but perhaps you should book a Genius appointment at your nearest Apple Store, they have the proper equipment to run a full diag on your MacBook and they'll be able to tell you what's causing the battery drain.

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alexlevinson さん、ありがとうございました!
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