I've a battery charger that can output 9v and 2.5A and I use full power from it that is 22.5W.
Can I translate this power consumption from DC to AC current?
My AC is 220V 50Hz, so I'll consume 22.5Wh when I charge my battery like a big lamp?
On device is also written 110V-240V 50Hz/60Hz and Max. consumption 0.68A related to AC.