Yugster offers the 3-in-1 Cree Rechargeable LED Flashlight / Lantern / Power Bank for $14.97. Coupon code "2DEALNEWS" drops it to $12.97. (Etekcity via eBay offers it for a few cents more.) With free shipping, that's the lowest total price we could find by $3. This 300-lumen flashlight can also be used as a standing light or a 2,400mAh battery charger.
Note: The countdown timer on the product page does not reflect an actual expiration time and resets daily.