Common Sense RC (4 Pack) Lectron Pro 3.7V 380mAh 20C Lipo Battery with Walkera Connector for The Hubsan X4 Quadcopter Lectron Pro batteries feature a high-end performance and reliability at an affordable price! Battery Voltage: 3.7V | Capacity: 380mAh | Maximum Continuous Discharge Rate: 20C (7.6 Amps) | Maximum Charge Rate: 2C (0.76 Amps) Battery Dimensions: 36mm x 20mm x 7.3mm / 1.42in x 0.79in x 0.29in | Weight: 10g Works great with Hubsan X4 quadcopter, H107L, H107C , and H107D FPV (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!