Greenjia via Amazon offers the Choe Quick Charge 2.0 Turbo Charger for $15.99. Coupon code "QB75QGH7" cuts it to $14. Plus, Prime members receive free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, it adds $6.18.) That's $36 off list and the lowest total price we could find. It features Qualcomm Quick Charge 2.0 technology which purports to decrease charging time by up to 75%.