Trakpower LiPo 2S 7.4V 5800mAh 90C Hard Case Square Battery with 5mm Bullet Connectors Balanced for longer life and achieving the maximum 4.2V/cell. Hard case design protects against the elements and crash damage. High capacities extend run times. Ideal for 1/10 scale off-road applications. Approved for ROAR-sanctioned 1/8 and 1/10 scale racing events.