Tenergy Propel 7.2V 4200mAh (40A Drain Rate) NiMH Battery Pack with Tamiya Connector Tenergy Sub C 4200mAh Propel Model--Beat or match IB Packs Continuous Discharge Rate: 10C ( 42Amps) Bust Rate: 20C (84Amps) Minimum Capacity: 4000mAh This pack works excellent with most RC vehicles Dimension: 136mm x 47mm x 24mm. Connector: Standard Tamiya Connector