Here's the backing, it's not a sticker, it's a complete replacement. I've been using it for about 5 months now and it really works well. Charges through the linked Spigen case on my Powermat. Also the new backings magnet is way stronger than the one in the QuickCircle case I also have.

LG G3 AT&T D850 White Battery Door Back Cover with NFC + PMA Wireless Charging Sticker USA http://www.amazon.com/dp/B00PQIH13U/ref=cm_sw_r_udp_awd_Dv8svb0SQ9DAY

LG G3 Case, Spigen® [+Screen Shield] LG G3 Case [Ultra Fit] [Shimme... http://www.amazon.com/dp/B00JQI311C/ref=cm_sw_r_udp_awd_av8svb1V4D2TB