Why do people keep mentioning waterproofing? There is exactly nothing preventing a waterproof phone from having a replaceable battery. It's not even hard to do.

Why do people keep mentioning waterproofing? There is exactly nothing preventing a waterproof phone from having a replaceable battery. It's not even hard to do. The main faucet to your house sits under 60psi water pressure all day, and the moving parts are removable. This is 100 year old technology.