Common Sense RC (4-Pack) Lectron Pro 3.7V 600mAh 35C Lipo Battery with JST Connector for Blade 120 SR and 180 QX Lectron Pro batteries feature a high-end performance and reliability at an affordable price! Battery Voltage: 3.7V | Capacity: 600mAh | Maximum Continuous Discharge Rate: 35C (21 Amps) | Maximum Charge Rate: 2C (1.2 Amps) Battery Dimensions: 58mm x 16mm x 6mm / 2.28in x 0.63in x 0.24in | Weight: 14g Works great with Blade 120 SR, 180 QX, mQX, UDI U818A, and Syma X1 (Always check the voltage, dimensions, and battery connector to ensure this battery will be a good fit for your vehicle/application) We're confident in quality of our batteries! All Lectron Pro batteries are covered by a 1 Year Warranty against any manufacturing defects and U.S. based support in case you run into any issues!