TRC-508 (210-0408) Battery Faxback Doc. # 7079 Each of the TRC-508 transceivers uses a standard 9-volt battery for operation. For longest life, we recommend the alkaline batteries are used such as Radio Shack Cat. No. 23-553. To install or replace each battery: 1. Remove the battery compartment cover by sliding it off. 2. Remove the old battery and dispose of it properly. 3. Install the new battery as indicated by the polarity symbols (+ and -) 4. Replace the cover. (smc-02/28/94)