Floureon 2packs 2S 7.4V 450mAh 20C Lipo Battery (1.89 x 1.18 x 0.43 inch) for RC Quadcopter Airplane Helicopter Car Truck Boat Hobby Chemistry: Li-Polymer; Cells Number: 2S ;Voltage:7.4V ; Capacity: 450mAh Discharge Rate: 20C ; Charge Plug: JST-XH ; Dimension:1.68*1.10*0.43 inch; Weight: 1.93oz Compatible: for RC Airplane, RC Helicopter, RC Quadcopter, RC Car, RC Truck, RC Boat, RC Hobby Note: Ready-to-Run, Please select the right connector according to your original battery. All the FLOUREON products sold by SEVESTO comply CE, RoHS, MSDS, UN38.3 Certifications.