It is a single coil device meaning cases to 3mm thick are fine. It would not make it through the EFM Armour
case at 5mm.
It grips the phone securely enough using more of a gravity
grip – as the phone presses downwards the
arms close inwards. The bottom support has a cut out to allow direct charging via
USB as well.
Choetech 10W Qi car charger charging Speeds
It can deliver 10W which is more than a Qi iPhone requires.
Using a Samsung Note9 as a GPS navigation device,
it was able to keep up with a considerable battery drain but not charge the phone
any further. When GPS was off, and it was just streaming Bluetooth music it was
able to get ahead slowly.