Its on sale at Got Vapes for$8. This is for my out and about vaping with a iTaste VV 3.0 or 1300man EGO Twist.I have a Protank I keep on by bedside table before going to sleep[ With a iJust 18650 VV mod] and am satisfied with it for that use. Was also Considering a Protank 3 mini any and all opinion , thoughts, experience Welcomed- I'm a rta guy for my ADV