What is the meaning of the top left LED

The question may sound trivial, but I did not find anything neither in the manual nor anywhere else. What’s the meaning of the blinking led at the top left of the device?

It’s a notification LED.
it can show you got an incoming message, or while charging it shows the charging status:
0-15% red
15-95 yellow
95-100 green
If I’m not mistaken.
Red blinking (while connected to a charger) means a deep empty battery.


That’s it. Thank you.