... K2,K3,K4,K5,K6,K7,K8Activate the battery: 5-click On/Off lockPtotection: Overcharging protection.-------------------------------------------------------------------------------------------- ... capacity650/900/1100mAhStandard voltage3.3V-4.2VFull battery keep for1100 puffsCharge time2 hourLife of batteryMore ... to customer requirementsFlavor100% Vegetable Glycerin with PDA, multi flavor for choosing