Note: This product contains a battery holder and does not include a for demonstration. 3. The retainer adopts the double screw locking method to enhance the and reliability. The internal elastic foam paper is not damaged to the fuselage; Tips for flying: It is recommended to check the battery for drum kits after each flight. The battery that has been drummed is not recommended to continue to use. 4. The product is 30g, ultra-light weight, and almost does not affect the endurance flight time. 1. This product adopts material, 3D printing process, and the surface has fine stripes; 1 x Battery Holder 2. This product can effectively the 2 from flying in the air by hooping the battery. Due to the high temperature, especially during days and violent flight, the battery drum packs the battery to buckle and thus loses power and causes the crash; 4. The Product Is 30g, Ultra-light Weight, And Almost Does Not Affect The Endurance Flight Time. Note: This Product Contains A Battery Holder And Does Not Include A For Demonstration. 3. The Retainer Adopts The Double Screw Locking Method To Enhance The And Reliability. The Internal Elastic Foam Paper Is Not Damaged To The Fuselage; Tips For Flying: It Is Recommended To Check The Battery For Drum Kits After Each Flight. The Battery That Has Been Drummed Is Not Recommended To Continue To Use. 1 X Battery Holder