A lot of flashlights and cheap gadgets have USB-C port but can only charge from USB-A port. The reason is that they cheaped out on including the resistors that

A lot of flashlights and cheap gadgets have USB-C port but can only charge from USB-A port. The reason is that they cheaped out on including the resistors that signal legacy USB mode. The USB-C to USB-A cable has the resistors. The smartphones should have proper USB-C port, I haven't heard of one with charging problems, and included USB-A cable cause cheap.