TOH have not nothing common with USB. edit: Ah, sorry .. you point to power wires from USB. My point is: USB data not connected to TOH. Then next question is: is 5V on this pin in case "work on internal battery and no battery in TOH"? By Jolla, this is 5V in/out pin? Or it is 5V in and for out we must use 3,6V from i2c?