As one of its daily deals, Meh.com offers the Iogear GearPower 2,400mAh Mobile Power Bank, model no. GMP2K, for $6 plus $5 for shipping. That's the lowest total price we could find by $7. It measures just 0.4" thick and features a 1-amp output. This power bank is designed for smartphones and MP3 players. Deal ends today.