... structure 3, fluent suction 4.durability 5.fast delivery 510 automatic Battery 180MAH Specifications: Diameter9.2mmBattery length73mmBattery weight13gBattery capacity180mAh Voltage3.7v ... into A, B, C, A-level for the optimal level) to ensure product quality. Battery products (including 510,808,901,4081,ego, and ...