I would like to see small appliances inbuilt batteries (mostly Li-Ion based) be prohibted. It contributes to device obsolescence and is a security risk --> burning waste dumps.
What I know off the top of my head, from reading the legislation a while ago. Is that technical reasons, such as waterproof devices, will still be able to retain non user replaceable batteries if it is needed to keep the device waterproof.
Vs how much you pay for it.