first up, this is my opinion. I think this is a terrible DIY job and he wants $50 for it. Watch the youtube video he posts and see that he has issues putting the wires on and closing it without them coming off. I did not have the time yet to do this myself and only tried the one below which occupies your USB port, but a flat ribbon cable would be a much better solution for this. So you may say, easy for me to say, but I sure would not post a half-assed solution on youtube and ask $50 for it. do it yourself and save the money. http://forums.windowscentral.com/mi...ireless-charging-lumia-640-a.html#post3137079
Looks like the price has been lowered to $39. Also looks like wmpoweruser did a good write up here:
mspoweruser.com/diy-cover-suggests-lumia-640-xl-supports-wireless-charging/
A bit rough but hey, if MS won't do it I'm glad someone is.