*The battery comes with the default mode of 3.2V
*Press the switch button for 5 quick clicks, the LED ring will turn from red to half red half blue and also the voltage will swap from 3.2V to 3.7V.
*Press the button for another 5 quick clicks, the LED ring will turn from half red half blue to blue and the voltage swap from 3.7V to 4.2V.
*Give another 5 quick clicks, the LED ring will turn from blue back to red and volt will shift from 4.2V back to 3.2V.