eCase via Amazon offers Prime members the Kmashi Quick Charge 2.0 20,000mAh Portable Power Bank, model no. Victor K6, for $32.99. Coupon code "NZK3Z24S" cuts it to $19.99. Plus, Prime members bag free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $5.99.) That's tied with our mention from two weeks ago, $30 off list, and the lowest total price we could find. It includes one Kmashi Quick Charge 2.0 20000mAh external battery, one micro USB cable, one VIP card, and a user manual. Deal ends December 31.