The waterproof tactical lighter is powered by a rechargeable battery,no any fuil or gas required. The waterproof tactical lighter could be work under any weather condition,especially the wind day. Charge through the USB interface by connection to computers, charges and any other chargers with the output voltage of DV 5V±0.5V and output current below 3000MA. Connect the charge first and then disconnect and reconnect the charger, at first-time use or when having not used for a long time ; Built-in smart charging circuit will light the indicator light at the bottom of the product when charging ,and the light turns off automatically after a full charge; Please disconnect the power immediately after fully charged .A charge can be filled within2-3h.Do not leave the fully charged battery connected to a power source ,because overcharging will shorten battery life; The battery is rechargeable ,and one charge can discharge hundreds of times .Before the battery is fully discharged ,immediate charges after use will extend battery life.