Given how security staff at airports are currently completely unable to correctly follow existing ban requirements and incorrectly claim things that are allowed are banned, any ban on any given type of battery is going to result in any type of battery being "banned" by security staff who are completely inept and unable to understand basic differences.
They could put in a ban on "Lithium batteries with more than 200Wh." and security staff will claim the ban applies to AAA alkaline batteries, Lithium batteries under 200Wh and any other battery they may come across. Which will then lead into them claiming phones, tablets and laptops are banned because they have batteries, in the same way that TSA bans things that don't have liquids because they think they have liquids.