Long lasting battery: 4000mAh RC racing battery has no memory effect, so you can always recharge your batteries, even if they are almost completely or partially drained High Performance: Uniquely engineered for high RC racing performance and delivers power when you need it. to bring your RC unit to the peak of its capabilities. Compact size: battery dimension (133*47*24 mm). Wide Compatibility: compatible with mostly popular standard 7.2V RC Car, RC Truck, RC Boat, RC Tank, RC Buggy, 7.2V NiMH battery has a high capacity rating of 4000mAh that can run your RC car and related applications much longer than NiCd cells. .