Understand the LED colors - e355

LED lights are used to communciate the status of your terminal.

LED behavior


Green, blinks every 4 seconds


Red, 1HZ rate, 50% duty cycle (Battery low condition: battery voltage 3.7V)

Battery Low

Red, 4Hz rate, 50% duty cycle (Battery extremely low condition: battery voltage 3.6V)

Battery Extremely Low

Orange, 1Hz rate, 50% duty cycle

Battery Charging

Orange, continuously on

Charging Timer Fault

Green, continuously on

Normal Operation


LEDs are turned OFF when charging the e355 on a gang charger