Venom Sport Power 40C 2S 4000mAh 7.4V LiPo Battery ROAR with Universal Plug (EC3/Deans/Traxxas/Tamiya) x2 Packs Battery Type: Lithium Polymer (LiPo) Battery Capacity: 4000mAh C Rate and Maximum Continuous Discharge (Amps): 40C (160A) Plug Type: Venom UNI Plug. Compatible with Traxxas Plug, Tamiya Plug, Deans Plug & EC3 Plug.