I bought a Black Web wireless charger from Walmart originally as a temporary charger until we got in the Samsung one. Honestly not going to bother. It works well enough, no heat and holds the phone at 100% once charged.
I looked around on Amazon and it seems to be identical to several they sell, just different branding.
I'm content at the moment, was only $20.
My Nexus 6 charger worked only at normal speeds. I like the magnet in it so ordered magnets to attempt to modify the Blackweb charger. They aren't necessarily needed, just something I want to attempt.