This is the Traxxas Power Cell 7.4V 4000mAh 25C 2S LiPo Battery. FEATURES: Semi rigid construction does not require a hard case and eliminates wire harness connectors that can loosen and fail Engineered specifically to fit Traxxas models 12AWG multi strand wire is soldered directly to the LiPo cells eliminating increased resistance from bullet connectors and accidental reversed polarity connections YOU WILL RECEIVE: Traxxas Power Cell 7.4V 4000mAh 25C LiPo 2S Battery with High Current Connector and JST/XH Balance Plug REQUIREMENTS: Balancer and LiPo compatible charger or LiPo charger with built-in balancer such as the Onyx 235, DTXP4235 LiPo charging bag SPECIFICATIONS: Configuration: 2S2P Continuous Discharge: 25C (100A) Max Burst Rate: 50C (200A) Watt Hours: 62.16 Charge Rate: 1C (4.0A) Max