3S850JST : 11.1volt 850mAh rechargeable Li-PO battery for R/C electric models. Replaces SPEkTRUM SPMX8003SJ50 and others. Replaces 11.1v 750mAh, 11.1v 800mAh, and 11.1v 850mAh batteries. Includes red JST motor connector and White Balance Charge connector. The Battery cells have discharge capability of up to 70 Amps, so the pack will provide the power that your RC model motor demands from it.   Dimensions: Dimension(±2mm):  67mm x 30mm x18.5mm (2.64" x 1.18" x 0.73")(L*W*H); Approximate Weight: (±15g): 74g/2.61oz..