As one of its daily deals, JustDeals offers this Marware 2,600mAh AMPED Portable Charger for $4.77 plus $5 for shipping. (It's the third deal on the right.) That's tied with our mention from last week and the lowest total price we could find by $18. It works with most USB-equipped devices, including phones, cameras, handheld gaming devices, and tablets. Deal ends today.