Simple swap out of an old, defunct battery.

My Problem

My old MacBook Pro battery just couldn't hold a charge, and I just couldn't ignore the warnings anymore.

My Fix

Easier than changing out AA batteries.

My Advice

I was a little concerned that this seems to be a 3rd-party battery, but it seems to function just as well as my original. I'd recommend this replacement, and I'm fairly confident that in the unlikely event this battery gives me any issues in the near future, iFixIt would set things straight.