LED lights are used to communicate the status of your terminal.
| LED behavior | Status |
|---|---|
| Green, blinks every 4 seconds | Sleep |
| 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 |
| Off | LEDs are turned OFF when charging the e355 on a gang charger |