eCase via Amazon offers the Kmashi Quick Charge 2.0 20,000mAh Portable Battery Pack, model no. Victor K6, for $30.99. Coupon code "HP5DKI9O" cuts it to $18.99. Plus, Prime members bag free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $6.82.) That's a buck below our mention from last month and the lowest total price we've seen. (It's the best deal now by $16.) It includes one Kmashi Quick Charge 2.0 20000mAh external battery, one micro USB cable, one VIP card, and a user manual.