Not attached to a charging cable

My Problem

Battery would not last longer than 3 hrs after unplugging and would randomly shut off while in use.

My Fix

Great step by step directions on ifixit.com. Task was completed in under estimated time on website.

My Advice

Have a white dish on hand to put all screws when taking phone apart. This allows you to see where they are and keeps them from rolling away. MAKE SURE TO PULL ALL ADHESIVE OUT BY THE TABS. IF YOU DONT, TAKING BATTERY OUT IS A PAIN.