E-flite 2S, 280mAh, 30C Li-Poly Battery Pack. This battery is compatible with a variety of E-flite UMX 2S applications and is a great high power upgrade. Specifications: Type: LiPo Capacity: 280mAh Voltage: 7.4V Number of Cells: 2 Weight: 0.6 oz (16.9g) Configuration: 2S1P Length: 1.5 in (39mm) Width: 0.8 in (20mm) Height: 0.5 in (13mm) Application: UMX 2S Airplanes Maximum Continuous Discharge : 30C Maximum Continuous Current : 8.4A Charge Protection Circuitry: No Is Assembly Required: No