Venom 25C 1S 250mAh 3.7V LiPo with Micro Losi Plug 4 Packs Fits Estes Dart, ISQ and V-Cam, H107C H107D H107L, Slipstream, Traxxas QR-1, UDI U816 and U830. Battery Type: Lithium Polymer (LiPO) Battery Capacity: 250mAh C Rate and Maximum Continuous Discharge (Amps): 25C (6.25A) Battery Volts: 3.7V