2200mAh Mini Black External Backup Battery for iPad 1 2 iPhone 4 4G 4S 3GS 3G 2200mAh Class-A branded lithium-ion battery built in Extend iPad's usage time by 3 hours of surfing web & watching video Support all iPad/iPhone/iPod 3 LED shows the charger's capacity & charging situation Quick Charging - Fully charge iPhone 4 in 1.5 hours, 1/3 charge iPad in 2 hours