It's worse than that, just because a charger can support 60W doesn't mean it supports every standard combination of volts and amps below that level and just bec

It's worse than that, just because a charger can support 60W doesn't mean it supports every standard combination of volts and amps below that level and just because a device can charge at 60W doesn't mean it uses the same combination of volts and amps your charger supports. I have a 100W charger than can't "fast charge" my phone (USB-C on both ends) because they only overlap capabilities on lower wattages.