The AC307NC-11V2200 battery is 11.1v 2200mAh version of AC307 battery with single LED light to display battery remaining level, no button, no adjustable output levels. To get adjustable output levels, please use with our T21sicpu silicon pushbutton heat controller(sewing to garments/gloves) or our L8, L16 motorcycle heat controller(external connection through wires). Application: battery heated shirt, battery operated jacket, heated pajamas, battery operated heated jacket, heated fleece jacket. The AC307 battery is designed for 11v electronic device or 12v heated clothing application. It has most compact size 22*76*65mm, with a LED display screen, a input/output wire with 5.5*2.5 coax type socket connector (or else specified). The AC307 battery LED light can be made to reflect the battery fuel level status by display Red/Orange/Green three colors, Red=less then 33%, Yellow=33~66%, Green=66%~100%(Or other way specified), Lights up during charge or di…