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Electronic lighter has a standard USB input socket. To charge connect it to your computer USB interface ,or any like charger with output voltage of DC 5V 3000 MA current. This lighter contains an eco-friendly lithium battery.Charge the lighter for 1 - 2 hours thereafter on each charging session. Immediately disconnect the power supply after charging. DO NOT keep the fully charged unit connected to the power supply for longer than recommended time as this will shorten the battery life. The LED light on the unit will blink when the lighter has a low charge,and off when fully charged. A full charge lithium battery will ignite hundreds of times.