TP850mAh Pro Power up to 25.5A/51A burst TP850 2S (7.4V) Rating: 30/60C Norm/Max Discharge Output: 7.4V Nominal, 850mAh Dimensions/wt: 2 3/8" x 1 1/8" x 1/2", 1.76 oz. 60mm x 30mm x 15mm, 50g TP850 3S (11.1V) Rating: 30/60C Norm/Max Discharge Output: 11.1V Nominal, 850mAh Dimensions/wt: 2 3/8" x 1 1/8" x 3/4", 2.65 oz. 60mm x 30mm x 20mm, 75g