As you connect your phone to the EL light up USB cable, the LED lights up, telling you that your device is already charging. You see, it is actually quite helpful too when you left your phone charging in a dark room. You will find it in an instance through the light coming from the Flow Charge’s cable. The length of the Flow Charge cable extends to 1 meter or over 3 feet - making it easier for you to charge or connect with other device even from across the room.
How EL light up USB cable works is as interesting as how it looks. The speed of light flowing in its cable varies according to the current charge of the device. If your mobile phone, say, has less than 65% charge, you will see the flow going very fast. On the other hand, when your phone has already more than 65% to 99% charge, you will notice that the movement of the flow starts to slow down. Then when the phone reaches its full battery capacity, the flow stops to indicate that your phone is ready to use as the EL automatically shuts off to save energy.