The status light is a handy feedback tool so you know what is going on. There are several options:
- RED => The light is on
- BLINKING RED => The light is on but the battery is low, use the solar panel or the USB to charge the battery
- BLUE => The light is charging with the solar panel or USB
- GREEN BLINKING => The charging is complete and the battery is full
The USB port is a back-up, under normal circumstances the solar panel will be sufficient to charge the battery. You can use a power bank or phone charger to manually charge the battery.