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.