ZOP Power 14.8V 1000mAh 70C 4S Lipo Battery XT30 Plug For RC Drone TURBO 4G Module For FS-TH9X Compatible

4G Module For FS-TH9X Compatible Protocol: Flysky AFHDS 2A Features: Second generation automatic frequency hopping digital system Supports AFHDS 2A receivers Only can be installed in the FS-TH9X Package Included: 1x FS-RM003 Fly Sky 2

you can find out the theoretic mid-point of servo exactly

if you want to buy T10 boat

360-degree pattern roll

ZOP Power 14.8V 1000mAh 70C 4S Lipo Battery XT30 Plug For RC Drone TURBO 4G Module For FS-TH9X CompatibleDescription: Battery Brand: ZOP Power Capacity: 1000mAh Size: 38*30*55mm Continuous Discharge Rate: 70C Weight: About 121g Note: Due to the difference between the measurement, the battery dimension and weight may have little error. Caution: Don't over charge, or over discharge batteries. Don't put it beside the high temperature condition. Don't throw it into fire. Don't throw it into water. Package Included: 1 X ZOP Power 14. 8V 1000mAh 70C 4S Lipo