3pcs 600mAh Li-ion Battery, 7.4V(2 3.7V) Li-ion Batteries with 1 to 3 Charger for UDI UDI001, 2s Battery 15C Replacement Battery for Venom RC Boat

I purchased the electronic charging unit as that keeps them from overheating during charge. Kept my RC boat moving at top speed with a reasonable operating time of about ten minutes per battery!

Could have put under breezeway not in the rain