All e-cigarettes with removable batteries use Li-On batteries, generally in 18650 format (18mm in diameter and 65 mm in height)
This is particularly useful to policymakers because it predicts the size of an impact a policy may have in discouraging consumption of a targeted product (e.g., carbon, cigarettes, alcohol, etc.)
The fact that numerous attempts in this direction have been made, and yet thee is no substitute for tobacco and no de-nicotinized tobacco in general use, is itself a sufficient answer to the question
Importing tobacco through overseas online retailers for delivery to a UK address carries compounding legal, financial, and product-safety risks including customs seizure by UK Border Force, retrospective duty assessment by HMRC, and significant exposure to counterfeit product in grey-market supply chains
other consumer products