Amazon is offering Discounts on Select Smartphone Cases and Accessories with corresponding codes. Shipping is free for Prime members or on orders of $25+. Some of the favorites:
Amazon has the Aukey PA-U42 Ultra Compact Dual Port 4.8A USB Wall Charger for $9.99 - $3.6 off with coupon FORDAD02 = $6.39 with free shipping for Prime members or on $25+. Has good Amazon Reviews.
Amazon has the Anker PowerPort Wireless 5 Pad Qi-Certified Wireless Charger (AK-A2518011) for $13 - $2 off with coupon ANKER323 at checkout = $11 with free shipping for Prime members or on $25+. Has good Amazon Reviews.