This is the Traxxas Power Cell 11.1V 5000mAh 25C 3S 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 INCLUDES: Traxxas Power Cell 11.1V 5000mAh 25C LiPo 3S Battery with High Current Connector and JST/XH Balance Plug REQUIRES: Balancer and LiPo compatible charger or LiPo charger with built-in balancer such as the Onyx 235, DTXP4235 LiPo charging bag SPECS: Configuration: 3S1P Continuous Discharge: 25C (125A) Max Burst Rate: 50C (250A) Watt Hours: 55.5 Charge Rate: 1C (5A) Max Charge Rate: 2C (10A) Dimensions: 6.1 x 0.98 x 1.8" (155 x 25 x 45mm) Weight: 12.3oz (350g) COMMENTS: ALWAYS use a LiPo-approved Charger ALWAYS use a LiPo Cell Balancer NEVER Charge over 4.20V per cell NEVER Charge at currents greater than 1C NEVER Charge through the "To ESC or "DISCHARGE" lead NEVER Trickle Charge NEVER allow to Discharge below 2.5V per cell NEVER disassemble or modify pack wiring in any way or puncture cells NEVER place on combustible materials or leave unattended during charging ALWAYS Charge in a fireproof location ALWAYS set charger"s output volts to match battery volts ALWAYS keep out of reach of children jxs 09/14/11 ir/jxs