On battery: shutting down before reaching 0%

[epb]

As the title of this thread indicates, my MacBook shuts down before reaching the 0% marker when running out of battery... Sometimes on almost 20%, sometimes less. In addition, I don't get a warning saying that the computer is running on reserve battery power before it shuts down (I used to get this message when the computer was i bit newer). Anyone who knows something about this problem? Am I just dealing with an old battery? The computer is about a year old..

 

[brianj08]

i have this same exact issue. if anyone has an answer please help. i was starting to thing my battery just may need to be re-calibrated.

 

[nZa]

I'm pretty sure that's what it's designed to do. 20% is a bit ridiculous, but mine does it around 5-8%. Why would you want to run your battery to zero and possibly damage your computer or the information you're working with anyway?

 

[technologist]

I'm pretty sure that's what it's designed to do. 20% is a bit ridiculous, but mine does it around 5-8%. Why would you want to run your battery to zero and possibly damage your computer or the information you're working with anyway?

It should give a warning first, and it should sleep, not shut down. Suddenly dying at an unpredictable level is not normal.

I'd calibrate the battery, of course, and reset the PMU. (http://docs.info.apple.com/article.html?artnum=303319)

Then take it to Apple, or call AppleCare if it doesn't go away..

 

[hagios1972]

Have you tried calibrating the battery?

 

[epb]

Have you tried calibrating the battery?

Yes, I have.. I do it frequently as recommended in the MacBook manual. I guess I'll have to talk to Apple then

 

[hagios1972]

Yes, I have.. I do it frequently as recommended in the MacBook manual. I guess I'll have to talk to Apple then

That is the best move for now ... let us know the outcome. Cheers ...