Target offers Anker PowerWave II 15W Qi Wireless Charging Pad for $14.99 (reg. $27.99) free shipping with Amazon Prime. 

Product Description:
PowerWave automatically switches between 5W, 7.5W, 10W, and 15W charging modes depending on your device’s power needs—ensuring optimized wireless charging for a wider range of devices than ever before. With a sleek design and fresh exterior, PowerWave II Sense Pad is premium both inside and out. PowerWave is compatible with virtually all Qi-enabled devices including iPhone 11, Samsung Galaxy S10, Sony Xperia XZ3, Pixel 4, and more. Wall charger and charging cable included.