Specifications for UR18650NSX Specifications Rated capacity(1) Capacity(2) Nominal voltage Charging Weight (max.) Temperature Energy density(3) Minimum Typical Method Voltage Current Time Charge Discharge Storage Volumetric Gravimetric 2500mAh 2500mAh 2600mAh 3.6V CC-CV 4.20V Std. 1750mA Std. 180min. 45.8g 10 to +45° C -20 to +60° C -20 to +50° C 512 Wh/l 204Wh/kg (1) At 20° C (2) At 25° C (3) Energy density is calculated using bare cell dimensions (without tube). Dimensions D (+) Hd Wit.