When you feel two quick pulses during a draw, coupled with a blinking single green LED light, it means it’s time to recharge your device. Use a USB-C charging cable and plug into an appropriate adaptor/charger (5V, not more, 1A or more). A full charge takes under an hour. You’ll know it’s ready when you see four green lights on the battery. It is not necessary to fully charge the device if you’re in a rush. The Vaporiser will function just as well half charged, you just may have to charge more often.