I recently bought an 860C display that has an USB port. The purpose of this port is that it can be used as a charging port for your cellphone etc. However, when I tried it with my i-Phone 13 no charge indication was displayed. I guess it has to do with the 500mA limit of this port. From what I have read most of these "Bafang" displays have the same 500 mA limit. (the original USB current limit) Any one else having issues charging their i-Phones using these kind of displays?