Features 1、Plane and Boat: This 4000mAh lipo battery is designed for RC plane, car, boat and other modified projects. 2、Long Lasting: This 7.4V 4000mAh RC lipo battery provides lasting working time, bring you longer entertainment time. 3、High Conversion: This RC boat lipo battery features stable performance and accurate design that can realize maximum energy conversion, providing high discharge performance and high power conversion rate. 4、XT30 Female Plug: This RC airplane lipo battery adopts XT30 female plug, it can be used as a backup battery or replacement battery to increase the service time of the remote control car. 5、Safe Material: This RC 8C battery is made of safe and durable materials, environmental protection, high performance is ensured, stable in structure. Item Type: RC 4000mAh Lipo Battery Material: Li Polymer Battery Voltage: 7.4V Battery Capacity: 4000mAh Discharge Rate: 8C Plug Type: XT30 Plug (Female) Product Color: Gray Product Size: Approx. 8.2 x 3.7 x 2cm / 3.2 x 1.5 x 0.8in (Excluding Connecting Wire) ( Manual Measurement, Slight Error May Exist ) Application: RC Aircraft, Car and Boat Batteries Package List 1 x RC 4000mAh Lipo Battery