Application: Automotive & Household Appliances, Flashlight, 6-Volt Lanterns. #HPR-50 - Amps: .85;Volts: 5.2; #HPR-51 - Amps: .70;Volts: 6.5;Battery Size: 5 or 6 D-Cells; #HPR-52 - Amps: .85;Volts: 2.8;Battery Size: 2 D-Cells; #HPR-53 - Amps: .85;Volts: 4.0;Battery Size: 3 NiCads