1. 2000mah  portable charger for iphone4 4S

2.  Output volt/current: 5.4V/600mA(max)+100mA(max)

3.  Battery capcity: 3.7V/2000mA.

4.  Indication: charging and discharging state

5.  Protection: reverse current protection circuit integerated to prevent batteries from being discharged

6.  Charging time for the mobile phone: <3 hours (It is a little difference for different mobile)

7.  Charging time for the Lithium polymer battery inside using the solar  panel: 12-14 hours

8.  Charging time for the Lithium polymer battery inside using USB charging cablel: 4-5 hours

9.  Constant Volts:5 V