eBay has a good deal on the mophie 7.5W Qi Wireless Charging Pad for $19.99 + Free Shipping!
A bit about this item:
Compatible with Apple iPhone X, iPhone 8, iPhone 8 Plus, Samsung smartphones, and other Qi-enabled devices; 7.5W of wireless power; rubberized, non-slip TPU coating
Eliminate the wires when you charge up your iPhone on this mophie Wireless Charging Base. Qi wireless technology powers up your phone 50-percent faster by simply placing it on the pad, and the rubberized surface ensures your phone stays put. The compact size of this mophie wireless charge pad is ideal for travel.