Yugster offers the Rosewill Powerbank 11,200mAh Dual USB External Backup Battery Charger in Black or White, model no. RCBR-13020, for $12.97. Coupon code "FaceBuck" knocks it to $11.97. With free shipping, that's $17 below our fall mention and the lowest total price we've seen. (It's a current low by $10.) This charger uses Samsung SDI batteries and features a 1A port, 2A port, LED flashlight, and LED battery indicator.
Note: The countdown timer on the product page does not reflect an actual expiration time and resets daily.