Application: Automotive|Flashlight|Spotlight and 6 Volt Lanterns. #K-2 - Amps: .70;Volts: 2.4;Battery Size: 2 D-Cells; #K-3 - Amps: .90;Volts: 3.6;Battery Size: 3 D-Cells; #K-12 - Amps: .70;Volts: 5.95;Battery Size: 5 or 6 D-Cells; #K-13 - Amps: .70;Volts: 4.75; #K-18 - Amps: .70;Volts: 7.2;Battery Size: 6 or 7 D-Cells