5 - 10 minutos
The battery life on my mid-2009 MacBook Pro had become shorter than a reality star's skirt.
I've never tried to fix anything on a computer other than cleaning crumbs out of the keyboard. The step-by-step guide on iFixit was really easy to follow and in about 5 minutes I was back in business! I also purchased the Pro Tech Toolkit, which certainly had everything I needed for this operation and for future fixes, too.
Just follow the instructions in the guide. If I can do it, so can you!