This is the TrakPower 2S 7.4V 50C 4400mAh Hard Case Short LiPo Battery FEATURES: Ideal for 1/10 and 1/12 scale on-road applications ROAR approved INCLUDES: 2S 7.4V 50C 4400mAh LiPo Short Battery with 4mm Bullet Connectors REQUIRES: Balancer and LiPo compatible charger, or LiPo charger with built-in balancer such as the Duratrax Onyx 235, DTXP4235 SPECS: Battery Type: Lithium Polymer Cell Number: 2S Rated Pack Voltage: 7.4V Capacity: 4400mAh Max Recommended Charge Current: 1C (6.4A) Continuous Discharge: 50C (448amps) Pack Dimensions: 0.94 x 1.85 x 3.8" (24 x 47 x 95.8mm) Weight: 7.69oz (217g) Discharge Connector: 4mm Bullet Balance Connector: 2mm Bullet 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 jxs 04/20/12 ir/jxs