Lectron Pro 3.7V 180mAh 45C Lipo Battery with Micro Connector for Blade mCX, mCX2, mSR, mSR X, Nano QX, & UMX AS3Xtra (2 Batteries) & Parallel Charging Board for Blade mCP X and mCX/mSR/Proto X Lipos Lectron Pro batteries feature a high-end performance and reliability at an affordable price! Battery Voltage: 3.7V | Capacity: 180mAh | Maximum Continuous Discharge Rate: 45C (8 Amps) | Maximum Charge Rate: 2C (0.36 Amps) Battery Dimensions: 43mm x 12mm x 7mm / 1.69in x 0.47in x 0.28in | Weight: 4g Works great with Blade mCX, mCX2, mSR, mSR X, Nano QX, UMX AS3Xtra, ParkZone Vapor, Micro Citabria, Cessna 210, Ember, and the Parkzone Sukhoi (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!