Aukey Direct via Amazon offers the Aukey Amp USB 3.0 3-Port Wall Charger for $21.99. Coupon code "R5HJPDNH" cuts the price to $10.12. Plus, Prime members receive free shipping. That's $22 off list and the lowest price we could find. It features a 2.4-amp output.

Also available is the Aukey Amp USB 3.0 5-Port Wall Charger for $24.99. Coupon code "N79URQMX" cuts the price to $12.99. Plus, Prime members receive free shipping. That's $19 off list and the lowest price we could find. As above, it features a 2.4-amp output.