Use anytime, anywhereWhen you are outside for travel or anytime when your cell phone is in shortage of power, you can charge your mobile & devices in time, and talk when charging.ConvenienceNeed only One AA alkaline battery or a Lithium rechargeable battery could be used for charging the mobile phone.Save MoneyMore economical than any competitive product and costs a fraction of the cost of an additional battery.High EfficiencyCharging 30-90mins, the charger can transfer the power from the single AA to mobile phone battery. And you can immediately get as long as 2 hours of talk time or 40 hours of standby time. (* Actual time varies with the status of network and mobile phone, and the remained power of the mobile phone.)Stylish & portable