USB Rechargeable Electronic Cigarette Lighter USB Cigarette Lighter Lighter no electricity to full three hours is sufficient . he main way of charging for the general computer USB port to charge , in addition because the state mandated that all cell phone chargers are standard USB interface , so the use of such standard charger for charging is also available . Lithium batteries have no memory of , you can take up the charge to use , it may not have to wait until there is no electricity to charge it , do not take up full use does not matter. Everyone has a different amount of smoking , coupled with other factors to help a friend cigarette lighter , it is difficult to calculate the time , conservative calculation can be fully charged 2.56 pack of cigarettes . Due to the unique design of the internal circuitry and a selection of electric wire material , while at the same time pull down the switch cigarette lighter near the electric wire, electric wire at the same time the smoke close to the heating wire will heat up enough to ignite the smoke . Feel any impact. First, do not place the product into water or other liquids , otherwise it will cause a short circuit .