Specification Battery VoltageBattery CapacityDischarge TimeSK1-EK58T-A3.6V/4.8V3.0Ah Ni-cd2 HourSK1-EK58T-B3.6V/4.8V4.0Ah Ni-cd3 HourSK1-EK58T-C3.6V/4.8V5.0Ah Ni-cd4 HourSK2-EK58T-A3.6V/4.8V3.0Ah Ni-cd2 HourSK2-EK58T-B3.6V/4.8V4.0Ah Ni-cd3 HourSK2-EK58T-C3.6V/4.8V5.0Ah Ni-cd4 Hour Emergency power pack Optimal for: T8 T5 TC-D/TC-L · Voltage: 230V 50-60Hz/120V 60Hz · Power<4W · Switch Voltage: 138-195V · Shutdown Voltage: 1V/cell · Operating frequency: 20-35KHz