Just wanted to pass along this info. I am using the Nokia DT-900 Qi charger and works great! Available in Verizon Store. Small footprint and charges with my Otterbox Defender case on the phone. I bought 2 ...one for home and work. Doesn't seem to heat up the phone like i've heard the LG charger does. I've seen questions regarding chargers and if they work with a case. Hope this helps. Links below for both if youre interested.
Amazon.com: Nokia DT-900 Wireless Charging Plate - Retail Packaging - Black: Cell Phones & Accessories
HTC DROID DNA Case| OtterBox.com
Amazon.com: Nokia DT-900 Wireless Charging Plate - Retail Packaging - Black: Cell Phones & Accessories
HTC DROID DNA Case| OtterBox.com