I’ve had a twin USB w/voltmeter from amazon on mine for 18.5k miles through all kinds of rain now and no issues so far. Charges stuff very quickly with one port being q.c 3.0 and the other a standard 2a usb. I always found the 12v plugs to shake loose anything i plug in and constantly need to be pushed back in. With a large q.c capable battery bank in the tank bag you can soak up a full charge riding and them charge everything at night as well which is very convenient. If you drill a punch out similar to the gen 3 versys you can install all kinda of addon’s if it has space. Since the 2017 and up has the shift position in the display I added USB/Voltmeter on the left and a temperature gauge on the right which is a blue sea OLED for marine applications, works great and very accurate.