Two (2) Digital Energy 7.2V 3300mAh NI-MH High Power RC Battery Packs with Tips - Universal Multi-Tip (EC3, Deans, Traxxas, Tamiya) - for RC Cars and RC Vehicles Delivers 7.2 volts with a capacity of 3300mAh Universal multi tip (EC3, Deans, Traxxas & Tamiya) Red light indicates proper connection between charger and battery. 100% Satisfaction Guaranteed when purchased through True Energy