Humixx US via Amazon offers the Humixx 10-watt Ultra Thin Rapid Wireless Charging Pad in Black for $17.49. Coupon code "55MJSXIY" cuts the price to $7.87. Plus, Prime members receive free shipping. That's a buck under last month's mention and the lowest price we've seen. It features 10-watt fast charging and 5-watt standard charging. Deal ends August 31.