Why does my MacBook keep shutting down?

[Krafty]

Whenever I get to 30-40% battery life my MB just shuts off. This is the 3rd time I've been working in class and it just shuts off without notification, and the battery status says about an hour left.

So why does it just shut off?

 

[smogsy]

you tryed re-calibrating your battery might be a misreading,

my macbook gets to 5% before it goes off

 

[aross99]

Sounds like you need to get your battery replaced. Apple has a replacement program for this that extends the warranty on the battery out to two years:

http://www.apple.com/support/macbook_macbookpro/batteryupdate/

I had two batteries replaced out of warranty with this same issue...

 

[Krafty]

Alright thanks. (Just realized i posted this in the wrong forum)

 

[whooleytoo]

I'm on a MacBook Pro, but am seeing the same. Consistantly around the 30% mark it shuts down. (I've already replaced one battery, and wasn't sure if I need to do so again or if it's just a matter of re-calibrating).

 

[caf9128]

Sounds like you need to get your battery replaced. Apple has a replacement program for this that extends the warranty on the battery out to two years:

http://www.apple.com/support/macbook_macbookpro/batteryupdate/

I had two batteries replaced out of warranty with this same issue...

How can this be?
According to the MacBook Air fans, batteries never fail, and never require replacement!

 

[Krafty]

How can this be?
According to the MacBook Air fans, batteries never fail, and never require replacement!

Yeah, too bad we're talking about the regular Macbook.

 

[bensmom243]

Sounds like you need to get your battery replaced. Apple has a replacement program for this that extends the warranty on the battery out to two years:

http://www.apple.com/support/macbook_macbookpro/batteryupdate/

I had two batteries replaced out of warranty with this same issue...

I just had my battery replaced last week. My MacBook was behaving the same way, it would shut off after just 15-20 min. with no warning (battery would indicate anywhere from 40-50%). I headed up to the local apple store, the genius took a look at it and replaced the battery on the spot. My Macbook was out of warranty (purchased in May 2006) as well. Good Luck!