Not Original) 11.1V 7000mAh Battery for Hubsan X4 PRO H109S RC Drone Replacement battery Spare Parts Accessories - AliExpress
Source Hubsan H109S X4 PRO Standard Edition RC Drone 5.8G FPV 1080P HD Camera GPS 7CH Quadcopter with 1-axis Brushless Gimbal RTF Dron on m.alibaba.com
Hubsan X4 Pro features parachute rescue system, tablet-style remote : FPV Central