PhoneSuit PhoneSuit Blue Flex Pocket Charger XT for iP5 Provide up to 150% additional iPhone power depending on your iPhone model Integrates a Powerful, High density lithium-ion Battery cell joined with an advanced chipset & electronics Simply attach the Flex XT to the bottom of your iPhone to charge. No need for extra iphone charging cables Allows you to keep your iPhone case attached and charge at the same time Charge your iPhone and iPod just about anywhere. Stay charged while walking, skiing, traveling, or simply running about the office