Gens ace Redline 2.0 Series 140C 5000mAh 2s 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 Redline LiPo battery pack has a high-capacity, high-discharge rate that gives you the power and run-time you expect.