The 850mAh 14.8V 4S 70C LiPo battery is part of Overlander's Exteme Pro Racing FPV range. This collection is flawlessly designed to cater for the use in first-person-view (FPV) racing drones. The immense power that these solid little batteries are capable of delivering is insane. With constant discharge rates soaring at 70C, it is no wonder that these batteries have made headlines in the racing circuit. The ever expanding FPV range is sure to set you apart from the rest. Keeping weight and size to the utter minimum, Overlander's FPV range is guaranteed to not only surprise you, but to consistently impress.