Remove the back cover of the phone, starting from the notch in the lower left corner.
To remove the battery, lift from the notch at the top right corner.
To insert the battery, place the bottom of the battery into the compartment, ensuring the gold contacts align with the terminals on the phone, and then press the top of the battery into place.
Replace the battery cover, pressing around the edges to snap it into place.
The battery has been inserted or removed.