But the compute hardware is fine, if you can get your own OS on it. Regarding the OP, battery is a problem. These old phones have bad batteries, and buying a n

But the compute hardware is fine, if you can get your own OS on it. Regarding the OP, battery is a problem. These old phones have bad batteries, and buying a new battery undercuts the carbon savings. And there's no need to use a phone battery as your server battery -- you can use any external battery.