I see there are qi wireless receivers available ... has anyone been successful with using one with an M8? What about thru a case? I'm using the dot view case, and would love to know what to get if someone else has gone down this path!
I tried the one for Galaxy S5 and charge it with kinds of case, all works. But the metal back cover of M8 may have influence.
No, the qi wireless receiver for S5 is removable, because it didn't come with the phone at first. And can charge with case or plastic battery cover directly.The receiver would have to be on the back of the phone since it isn't removable. So it should work unless your case is metal.
I searched around on Amazon, and there are a few different ones available. While most will no doubt work with the M8 (if the right connector type is chosen), this one (Amazon.com: Type B Micro USB Qi Wireless Universal Kr-net Charger Pad Receiver Coil For Smartphone: Cell Phones & Accessories) had the highest output.
When I went finalize the order, the delivery time is 17-28 days ... so I cancelled the order and will search again in a couple weeks. Maybe by then someone can verify if it is too thick to use with the dot view case.