... voltage4.2V-3.3VCharging voltage:4.2VCharging time:2.5-3hoursFull battery can keep for:900- ... the environment. With no danger of second-hand smoking.(2) Smoke in public places, busses, restaurants, planes ... CE,ROHS,TUV,SGS,UL,PSE approve.(3) 2 years e- cigarettes manufacture whose products export to ... days(5) New product output every month with Best price and qualityExtra service Design client's LOGO on ...