This is the GrimRacer 2S 7.4V 5000mAh 40C LiPo Battery from AquaCraft. FEATURES: Designed and tested specifically for boat hulls and boat racing INCLUDES: GrimRacer 2S 7.4V 5000mAh 40C LiPo Battery with Deans Ultra Discharge Connector and ElectriFly style Balancing Plug REQUIRES: LiPo compatible charger and balancer SPECS: Voltage Rating: 7.4V Cells: 2 Rated Capacity: 5000mAh Discharge Rating: 40C Continuous, 80C Surge Max. Recommended Charge Rate: 1C (5.0A) Discharge Lead: 10 gauge wire with Deans Ultra connector Balancing Plug: ElectriFly style Dimensions: 6.34 x 1.77 x 0.75" (158 x 43 x 19mm) Weight: 10.3oz (291g) jxs 03/30/11 ir/jxs