Late 2011 MacBook Pro - new battery.

내 문제

Existing battery wouldn't hold charge. Computer would shut down after only 45 minutes unless plugged into power source.

나의 수리

Easy Peasy ---- Just unscrewing the screws, popping of the battery cable, out with the old, in with the new battery and reverse the access process.

내 조언

Much easier than the "moderate" difficulty rating.