Follow each step carefully.
Press and hold the power button until the power off slider appears, then slide to power off.
Use a plastic opening tool to gently pry open the back cover from the device.
Identify the adhesive tab attached to the battery at the bottom edge.
Carefully pull the adhesive tab straight out to detach it from the battery.
Align the new adhesive tab with the battery and press it firmly in place.
Align the back cover with the device and press down until it clicks into place.
Press and hold the power button until the device vibrates and the screen lights up.