The downside of using the wireless charging is that it's prone to overheating since it's not cooled. I connect the USB cable and leave it there when I want to charge it, as it's faster, so when the cable is connected it does not charge wirelessly. But yeah when I don't want to charge it I put it in the slot or face downIs there a need to turn it off?, the phone will only charge if it's needed, otherwise it'll just sit there if it's already charged, alternatively you could place your phone in the slot provided in front of the charge pad?