... battery supplies power to LED,CCFL,earphone jack,siren and AM/FM radio. AC dynamo charger: Winding the dynamo crank can charge mobile ... battery supplies power to LED,CCFL,earphone jack,siren and AM/FM radio. Dry batteries supply power to LED,CCFL,earphone jack,siren ... and AM/FM radio.Power standing time of dynamo charger Wind the dynamo handle ...