eCase via Amazon offers the Kmashi 15,000mAh Dual-USB External Battery Power Bank
in Black/Red, model no. MP836, for $19.99. Coupon code "FBDXPO7W" cuts that to $12.50
. Plus, Prime members bag free shipping
. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $6.74.) That's tied with last month's mention and the lowest total price we could find now by $8. It features a 2-amp USB port, 1-amp USB port, status LED lights, and a microUSB cable.