ATC LLC via Amazon offers the Imneed 10,000mAh Portable External Power Bank in Black, model no. 206-1008-1058-F, or White, model no. 206-1008-1059-F, for $14.99. Coupon code "IZIJWYH4" cuts it to $10.99. Plus, Prime members bag free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $6.52.) That's the lowest total price we could find by $4. It features two USB ports and an LED battery level indicator. Deal ends December 19.