It doesn’t even need to be plastic. The battery could slot into the side of the phone on a tray with a gasket to try and seal it.
Personally I don’t think the battery needs to be as easily replaced if it lasts longer. Lithium ion cells degrade too quickly but a lithium iron phosphate cold last for 10 years before dropping below 85% charge capacity.
The only drawback is they have about 30% less energy density but imo making the battery 30% larger is not a big deal. Phones have obsessed with being pointlessly thin for so long. Basically just remove the dumb camera bump.
It doesn’t even need to be plastic. The battery could slot into the side of the phone on a tray with a gasket to try and seal it.
Personally I don’t think the battery needs to be as easily replaced if it lasts longer. Lithium ion cells degrade too quickly but a lithium iron phosphate cold last for 10 years before dropping below 85% charge capacity.
The only drawback is they have about 30% less energy density but imo making the battery 30% larger is not a big deal. Phones have obsessed with being pointlessly thin for so long. Basically just remove the dumb camera bump.