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You know the metal square thing you put on the back of your phone so it can attach to a magnetic car mount? Can I leave that on the back of my phone and also be able to wirelessly charge?
I would say no. It's induction charging so if anything it will just heat the plate. I am not sure about S20 but some phones with wireless can connect to magnetic holders without a plate. I think something in the designs allows it as a byproduct. Few pixel models and someone said motorola phones.
Yes you can.. I do..
Does one exist? I used the official samsung car mount but it would often overheat my phone and I would prefer a lower-profile magnetic one. Most of the unofficial magnetic wireless chargers I've used in the past wouldn't trigger super fast wireless charging, I'm wondering if that's changed.