... Charge/Discharge Characteristics C size NI-MH battery 4000mAH 3.6V Product Specifications TypeC size Nickel Hydrogen Cylindrical Battery PackNominal Voltage3 ... . ApplicationMP3, Walkman, E-toys, E-tooth brusher, Brushes shaver, LED torch, Alarm system, Fire alarm, Mining light, Sex toys, Adult toys ... . 100% real capacity. C size NI-MH battery 4000mAH 3.6V