Android Battery Status

Hi everyone,

I am a informatics student from germany and i got a simple question: I found this: Visible Flowing Charging Cable Light up for Apple iPhone/iPad/iPod - YouTube on the internet. So I am asking myself how does the cable know the battery status of the phone? (becuase i read that it blinks slower when the phone is nearly full) SHORT: I need to know how to get the battery status of a android phone to a arduino (without an app on the phone if possible).

Who can help me? :slight_smile:

The plug contains the electronics for the leds. There is also a current sensor in the plug to sense how much current is going into the phone.