This is SF501233RH15 130mAh 3.7V Li-polymer battery. Type: Lithium Polymer Nominal Capacity: 130mAh Nominal Voltage: 3.7V Configuration: one single cell Dimensions( T* W* L) : 7.2* 12.85* 39.0mm ( max) Weight: Approx.: 3.9g Maximum Continuous Discharge: 15C Maximum Continuous Current: 1.95A Ideal for use in various kinds of RC toys, helicopters, airplanes, ect.