Comes with a 900 mAh Ego Battery with Mini Pro Tank and USB Charger. Generally a 900 mAh battery will last 7-9 hours of vape time, however this is dependant on the user and the users style of vaping. Overall the fully charged battery can support an atomizer for approximately 800-1000 puffs. The mini Pro Tank is a bottom fill, bottom coil Glass Clearomizer tank system with replaceable atomizer heads and has a eLiquid capacity of about 1.5ml. Comes with standard ego/510 thread. Available in 7 Colours