Harness the power of the sun with the Exec-Duo Solar eCharger to charge your iPhone and iPod Touch while on the go. This leather case features 2 solar panels that fold into a leather travel holster. Recharge through the sun, internal Li-ion Battery (also rechargeable through the sun), or via a USB port. Charge as a pass-through directly to the device or the internal Li-polymer battery. Charges via USB either from computer or USB charger. This portable charging system provides 2 extra hours of talk time when fully charged. Two 900 ampere hour lithium ion battery packs (total 1800 ampere hour) fully charge your device in less than 4 hours. It features a power display with Battery Status LEDs indicating charge from 25%-100%. 2000 milliampere battery extends your total use time to 7 hours. Weighs: 7.2 oz.