These phones need to start becoming recyclable, not just electronics recyclable, but plastic lot recyclable. Screens are difficult to be made of plastic right

These phones need to start becoming recyclable, not just electronics recyclable, but plastic lot recyclable. Screens are difficult to be made of plastic right now, but someone is working on a replacement to LED lights that uses plastic instead. So there is promise here. That leaves the battery. I cannot think of a recyclable material (plastic or aluminum metal) to replace the battery. When that happens, I think such $4 smartphones will not be damaging to the environment.