Venom 35C 2S 3800mAh 7.4V Hard Case LiPo Battery ROAR with Universal Plug (EC3/Deans/Traxxas/Tamiya) x4 Packs Battery Type: Lithium Polymer (LiPo) Battery Capacity: 3800mAh C Rate and Maximum Continuous Discharge (Amps): 35C (133A) Plug Type: Venom UNI Plug. Compatible with Traxxas Plug, Tamiya Plug, Deans Plug & EC3 Plug.