£19.99. All colours available. Free UK delivery. The Innokin Endura T18E Starter kit is the most popular pen style e cigarette in the UK due to it’s stylish simplistic looks, great battery life from the built-in 1000 mAh Lithium Polymer cell and top filling, leak-proof prism tank with replaceable coils . A simple 3 click on/off button with 3 colour battery level indicator makes the perfect starter vape pen for beginner vaper’s.