Charging the Angel Sensor M1

In brief 

The new Angel Sensor M1 is developed exclusively for developers. Compared to the previous Angel Sensor device, it seems to me this one to be simplified in terms of user interface. In fact, it has a button that can be used by the end-user , some lights and vibration.

As an user, I am a little bit confused every time that I try to re-charge it, therefore I decided to create here the instructions

Instructions

1. Connect the Angel Sensor to your USB 

2. Press its button for more that 10 seconds until you feel the vibration and the lights to be turned on

3. Done !