1)5000mAh Rechargeable Backup Battery Charger Power Bank Case:<Br> * Capacity: 5000mAh<Br> * Output: 5.0V/2.0A<Br> * Input: 5.0V/2.0A<Br> * Charging time: 4-6 hours.<Br> * The LED lights indicate how much power is left in your phone battery case.<Br> ( 4LED>100%, 3LED>75%, 2LED>50%, 1LED>25% )<Br> Here is the instruction of how to use this backpack power station.<Br> Push power button to turn on battery pack. you should see one or more blue LEDs light up.<Br> If you can see blue LED light up, it means the battery pack is on.<Br> If you see no blue LED light, then push the power button again to turn on battery pack.<Br> Plug in your cellphone into the battery pack when it is on, the battery pack should start charging you cellphone.<Br> If not charging, please push the power button to switch battery pack to phone charging mode so it will start charging your cellphone.<Br> To charge the battery pack itself, connect battery pack to a USB cable thru the bottom USB port to wall charger, the battery pack should now be charged and the blue LED flashes.<Br> Note: The power button serves as a power on/off button and also serves as a switch between phone charging mode and self-charging mode.<Br>