Buy Mellow Fellow Premium Air Flow 510 Thread Replacement Battery for THC Carts Always be in control of your vaping experience with our Airflow Battery. Perfect to use with your favorite Mellow Fellow Delta-8, Delta-10, and premium blend cartridges. This 510 thread battery comes with three temperature settings and adjustable flow. Customize the perfect hit for you every time. Charging cable is included to make it easy to keep this bad boy juiced up and ready to go.     100% Authentic Mellow Fellow ProductMade to be used only with 510 Thread Cartridges Directions for use: To charge: Use included Micro-USB cable. Airflow Control: Rotate dial to desired draw intensity. Adjustable voltage: Quick press 3 times to adjust voltage Green - 2.5V   Blue - 3.2V   Red - 3.7V