Aropey via Amazon offers the Aropey 4-Port USB Charger & Multiport Desktop Charging Station for $13.99. Coupon code "KNVLQS95" cuts the price to $9.79. With free shipping via Prime, that's $16 off list and the lowest price we could find. It pumps up to 20 watts (max output 4A) and is universally compatible. Deal ends August 31.