

It depends on the power density. A battery with the current power density but increased longevity isn’t going to be as useful as you’d think.
A battery that is able to have the same power output as current batteries but last a century is going to be a weapon of mass destruction.



But less electronics waste is less profit. If everyone who bought a 2 year phone bought them every 4 years instead, that’s a 50% drop in sales.