Optimus AM/FM Pocket Radio (120-0454B) Batteries Faxback Doc. # 56239 Installing Batteries Slide off the battery compartment cover in the direction of the arrow. Install three AA batteries as indicated by the polarity symbols (+ and -) marked inside the compartment. CAUTIONS: Match the polarity symbols (+ and -) marked inside the battery compartment. Always use fresh batteries of the required size and type. (EB 8/5/99)