What if we regulate batteries even more? i.e. what if, in some magical perfect world, the world get's together and agrees on batteries for phones like how we agree on AA,AAA,D,C batteries? Even more though.. a standard connector, a standard comms bus, a variety of sizes, and they were designed for reuse as efficiently as possible.
Now we can scale up volume, swap them out, be free to purchase from a different manufacturer, and have scaled up recycling services.
I'd settle for requiring the battery specs to be fully available, and that they can't be made difficult to manufacture without good reason.
Ideally, there should be some set of standard protocols/connectors/voltages/sizes, but the manufacturer should only be held to "downward-compliance" with at least one of them, so they can have flexibility in design but still leave a suboptimal standard option available to users as a fallback.
That's an excellent idea! It will work out absolutely great - much like Communism.
Meaning, when you forcefully standardize and regulate how phones are built, you might expect that companies will not compete on making better phones (since they are not very much differentiated) but on who produces the cheapest phone.
Phones would be hard because manufacturers want to fill every square mm of it, but we can start with power tools batteries...