Lift the battery cover off from the slot on the bottom the device.
Remove the battery by lifting from the slot at the bottom of the battery.
Clean any debris off the gold contacts on both the battery and the device.
Note: To clean the contacts it is recommended to use a soft, dry cloth.
To re-insert the battery, place the top of the battery in the compartment, ensuring the gold contacts align with the terminals at the top of the device, and then press the bottom of the battery into place.
Reattach the battery cover.