This guide will show you how to remove the battery from your BlackBerry 7100g.
Turn over your BalckBerry 7100g so that the back cover is facing up.
Locate the battery cover release button near the bottom of the back panel.
Push down on the release button with one thumb.
Slide the battery cover off with the other thumb.
Remove the battery from the battery housing by flipping up the top of the battery.