Ooze | Slim Twist Battery Assorted Colors W/ USB Charger

Press the button down to take a hit, and the battery will shut off after 15 seconds of inhaling to prevent overheating. Activate preheat mode by clicking the button twice and the battery will heat for 15 seconds without needing to press the button down. These are 320 mAh devices that include an Ooze smart USB charger with built-in overcharge protection. The chargers automatically shut off as soon as the battery reaches a full charge, greatly extending the overall life of the battery.