12-06-2007, 05:53 PM

Hi all. I have recently noticed something my macbook pro doing that is annoying me. I use it a lot on the move, and previously in the past when it has ran out of battery (obviously after warnings) it will shut down, but when I reconnect it to a power source it will start back up from where it left off, documents etc in tact. Now, when it runs out of battery, it simply shuts down and when I reconnect it, it does a normal start up from scratch - so any documents etc are lost.

Why has it started doing this and how do I fix it?

Thanks.

12-06-2007, 06:00 PM

Originally Posted by dilby

Hi all. I have recently noticed something my macbook pro doing that is annoying me. I use it a lot on the move, and previously in the past when it has ran out of battery (obviously after warnings) it will shut down, but when I reconnect it to a power source it will start back up from where it left off, documents etc in tact. Now, when it runs out of battery, it simply shuts down and when I reconnect it, it does a normal start up from scratch - so any documents etc are lost.

Why has it started doing this and how do I fix it?

Thanks.

The reason it comes back after being extremely low is that OS X will put the machine into sleep mode when the machine reaches a critical threshold. My guess is that your PMU needs to be reset as OS X thinks the battery has more capacity than it actually does.

http://docs.info.apple.com/article.html?artnum=303319