MELASTA 7.2V 4200mAh Flat NiMH High Power Rechargeable Battery Packs with Tamiya Connector for RC Cars Structure: built with 6 MELASTA Racing Cells. High Quality: No cell memory effect. Compatible with:radio controlled brands and hobbies with RC cars, RC tanks, RC trucks, RC boats such as Traxxas, LOSI, Associated, HPI, Kyosho,Tamiya brands,RC10 cars,and turntables Standard Dimension: 136.82 x 47.83 x 24.49mm / 5.39 x 1.88 x 0.95 inch. Warranty: 35- DAY return policy and 1 Year warranty.