Designed specifically for Kenwood handheld radios, the KNB-15A battery pack is composed of Nickel Cadmium, allowing it to hold a substantial charge of up to 1500 mAh and able to produce up to 7.2 Volts pf power. The pack functions in the following Kenwood TK models:TK2100, TK3100, TK2102GK, TK3102GK, TK260, TK360, TK270, TK370, TK272G, TK372, TK373.