2. Ellington a battery in the compartment according to the polarity symbols {ยป and -} marked inside. 3. Replace the cover and secure it with the screw. When the transmitters range decreases, replace its battery. In The Challenger The Challenger requires two AA batteries. For the best performance and longest life, we recommend Radio Shack alkaline batteries Follow these steps to install the Challenge's batteries, 1. Slide OFF/ON on the libation the Challenger to OFF, 2.
