This guide shows you how to remove the battery in case of needed replacement.
Locate the button on the bottom of the back cover.
Depress the button with your finger.
While the button is depressed, slide the back cover off of the phone.
Place the phone so that the battery is face up.
Insert a screwdriver or spudger into the crevice above the battery.
Use a screwdriver or spudger to lift the battery out of the casing.