Gens Ace Redline 2.0 Series 2S 140C 6600mAh Hardcase LiPo Battery Pack; with a factory installed 5.0mm bullet. Consumers trust the Gens Ace name to deliver the dependability and high performance they expect. The Gens Ace 140C 2S 6600mAh 7.6V HV LiPo battery pack has a high-capacity; high-discharge rate that gives you the power and run-time you expect .