Battery life not what it used to be on your MacBook? Does your MacBook Pro have you running for an outlet like bad actors in an Imodium AD commercial? While you might have a bad battery there is a good chance you just need to calibrate your battery. How you ask? Well, Apple makes the process clear enough:
The battery calibration for the PowerBook G4 (15-inch Double-Layer SD) and any model of MacBook or MacBook Pro has been updated because of a new battery released with this computer. With these computers, follow these steps to calibrate your battery:
1. Plug in the power adapter and fully charge your PowerBook’s battery until the light ring or LED on the power adapter plug changes to green and the onscreen meter in the menu bar indicates that the battery is fully charged.
2. Allow the battery to rest in the fully charged state for at least two hours. You may use your computer during this time as long as the adapter is plugged in.
3. Disconnect the power adapter with the computer still on and start running the computer off battery power. You may use your computer during this time. When your battery gets low, you will see the low battery warning dialog on the screen.
4. Continue to keep your computer on until it goes to sleep. Save all your work and close all applications when the battery gets very low, before the computer goes to sleep.
5. Turn off the computer or allow it to sleep for five hours or more.
6. Connect the power adapter and leave it connected until the battery is fully charged again.
Afterwards try using a program like Coconut Battery to see how healthy your battery is. Unfortunately if it is like mine (near 60% health after less than 200 cycles) you might need to bring your battery to the good folks at Apple.