Redcat Racing Volcano-18 V2 Electric Monster Truck with Waterproof Electronics (1/18th Scale), Red Electric Brushed 370 Motor Waterproof 2 in 1 ESC/Receiver Transmission Forward and Reverse Li-ion 7.4v 800mAh & Charger Included Radio requires 2 AA Batteries (Not Included) The battery for this item is part number 28021T. This is the only battery that will work with this item.