I have a theory when it comes to metamorph themes and the battery. Every metamorph theme has the battery is increments of 20. I argue that the phone will recognize increments of 10.
When you plug in your phone don't you see it at 30% or 50% or 70%
So how does the phone recognize that it is at those increments of 10?
Maybe someone could create a theme with a battery icon adding all the increments of 10, and see what that does. Let me know your thoughts