Yes, Gilligan's Island frequently used a pedal-powered bicycle generator as the castaways' primary source of electrical power. The device, often constructed from a bamboo bike frame and salvaged generator parts from the S.S. Minnow, was used to: Charge the radio batteries, allowing the castaways to hear weather reports and rescue attempts. Power the camera from the Silent Film crate. Charge the Cosmonaut's capsule while the Professor repaired it. Simulate lightning bolts during recreations of the shipwreck. Operate various appliances, including a washing machine, water pumps, fans, and a makeshift telegraph. The show established that the radio batteries were rechargeable, and the bicycle generator was the consistent method used to maintain their charge throughout the series.