1. Meet An Emergency Wherever you are no need alternating current ,you could charge your mobile phone in time ,and could talk with others when charging . 2. High Effect ,Save Resource Charging 30-60mins ,the charger could transfer the resource from the single AA to mobile phone battery .And could get the phone keep waiting 24 hours or talking 100-180 mins . 3. Modem And Portable Special designed ,modern style ,small size (size bigger than AA a little only ),portable . 4. Convenience One AA alkaline battery a NI-MH rechargeable battery could be used for charging the mobile phone 5. Safe Use Over voltage protection for the circuit and your mobile phone ,smart charge ,safe use