iGo Green Backup Battery and Wall Charger 6630079-1400 The iGo green charge anywhere backup battery and wall chargerprovides both power and wall charging juice in one, compact, portable unit. The two USB ports allow simultaneous charging of two devices simultaneously. An integrated 1800 mAh lithium-ion battery adds hours of extra talk time. Since the iGo green Charge Anywhere eliminates the need for external battery packs and associated chargers, it makes for the perfect travel charger. Just bring your devices USB cables and you're all set!