Right now, over on DailySteals, they have the Mophie Powerstation Duo XL going for just $49. The Powerstation Duo XL is a 12,000mAh battery pack with two USB ports and four LED lights to indicate how much battery is left. Both ports output 2.1A, so they should charge your phone pretty quickly. This is usually priced at around $129, according to DailySteals, but it's currently at just $49. You can grab it from the link below.