SF853496SH35-3S1P/ 11.1V This is the safty energy RC helicoptor series lithium ploymer batter with balance connector. capacity: 2200mAh number of cells in series: 3 rated voltage: 11.1V max charge voltage: 12.6V min discharge voltage: 9.0V continuous discharge current: 77.0A( 35C) burst discharge current: 154.0A( 70C) pack dimension: 26.8* 34* 103.0mm( mid-value) weight: about 183g great for the T-Rex450