... fluent suction 4.durability 5.fast delivery 510 automatic Battery 180MAH Specifications: Diameter9.2mmBattery length73mmBattery weight13gBattery capacity180mAh Voltage3.7v ... A, B, C, A-level for the optimal level) to ensure product quality. Battery products (including 510,808,901, ... structure, fluent suction and durability. each of the battery has short circuit protection function, to ensure that the ...