NC700 charging amperage and volts
What is the allowable input amps and volts? Your manual very unhelpfully states "into a USB-A wall charger or computer that is powered on." Great, well I have chargers at 5V 0.7A, 5V 1A, 5V 2A, 5V 2.4A, as well as PowerDelivery 2.0 chargers. I could even buy a QuickCharge 4+.
So, what does the headphone support? Only standard charging up to a specific amp and volt? Does it support either QuickCharge or PowerDelivery, and if so, which version? It would be truly shocking if a brand new product doesn't offer one of these.