Cleaning Standard 808D Battery
Your 808D battery needs to be cleaned periodically for extended life and performance. To clean the threads and the battery connection, use a Q-tip soaked with alcohol, careful not to get alcohol inside the battery by holding the thread end downward. Below the threads of the battery is two small vent holes, clean the holes out with a straight pin, safety pin or anything small enough to remove the buildup from the opening.
Note: allow to dry briefly before use.