How do you tell if Powercore 13400 is charging

Since the manual has no information whatsoever I was wondering if there is anyway to tell if the powercore is recharging. I wish there was some product information.


When you plug it in and its charging the LEDs in the button will light up and go around in order as it charges. Once its fully charge the lights will go off, at which point you can unplug it and press the button to see that all the lights light up if its fully charged