It is possible that like most good quality chargers for lithium batteries, the charger turns off when the battery is charged and does not trickle charge. Maybe you can message the manufacturer and askUpdate: no interference with the Compass at all even though it’s mounted within 8” or so of it.
The Scanscrut ROKK recharger works great with my iPhone SE, fast recharging, with great spring loaded “arms” on the mount that hold the phone securely in place even in rough seas.
This is the one I bought:
ACTIVE-SC-CW-04F Qi-Wireless Charge Power Boat
Wireless phone charging mount, waterproof wireless...www.scanstrut.com
My only complaint is it does not have an On/Off switch. I’m going to have to rewire it and add a toggle switch I guess.… I want to use the mount when the juice is off since it’s in a great location to see the screen while driving, but I’m not comfortable leaving the iPhone charging after it’s already reached 100%.
I think that's actually a function of the phone as opposed to the charger? I'm not real tech savvy, though. However, I Ieave my phone connected to it's wall charger all night... or while driving connected to the car even after it's charged. Zero issues... and quite honestly, never even thought about it.It is possible that like most good quality chargers for lithium batteries, the charger turns off when the battery is charged and does not trickle charge. Maybe you can message the manufacturer and ask