Alatatac via eBay offers the Enercell 3-in-1 Portable Universal Combo Car Charger, Wall Charger, and Power Bank in White or Black for $5.99 with free shipping. That's tied with our mention from a week ago as the lowest total price we've seen. (It's a current low by $7.) It features a 1,350 mAh cell capacity and supports most portable devices with USB.