Auto draw buttonless vape pen batteries are vaporizers that are activated by inhaling.  The inhalation is commonly referred to as the draw or drawing.  Unlike their push-button vape counterparts, auto draw vaporizers do not have an on/off power button.  Their functionality is simple in that they automatically start working when you attempt to inhale from your auto draw vaporizer.  If you do not inhale they do not work.  There are airflow sensors located within buttonless vape pen that will automatically turn the battery on and heat the concentrates, oils, or other contents in your prefilled 510 thread cartridge as long as you continue to inhale and will cut off immediately when you stop drawing on your vaporizer.