Greenjia via Amazon again offers the Choetech 6-Port Rapid USB Wall Charger for $19.99. Coupon code "DVS9N3GX" drops it to $17.98. Plus, Prime members receive free shipping. (Non-members can spend $35 to qualify for free shipping; otherwise, it shipping $6.52.) That's tied with our mention from last month and the lowest total price we could find by $9. It provides up to 50 watts of power with smart detection technology.