I have a fully charged battery. Even shows full in the toolbar. But when I power up my Powerbook, I get the message that I am running on reserve power and after a few minutes the computer shuts down. Once I hook up to my power cable it works fine. But I cannot use this Laptop on the go because the battery won’t last. What gives?

Check here:

http://www.apple.com/search/support/?q=macbook+battery

The Apple Support forum should be your first stop with Apple questions.

Why does my Mac PowerBook keep running out of power?
Why does my Mac PowerBook keep running out of power?

I have a fully charged battery. Even shows full in the toolbar. But when I power up my PowerBook, I get the message that I am running on reserve power and after a few minutes the computer shuts down. Once I hook up to my power cable it works fine. But I cannot use this laptop on the go because the battery won’t last. What gives?

Check here:

http://www.apple.com/search/support/?q=macbook+battery

The Apple Support forum should be your first stop with Apple questions.