After your Eargo devices are inserted, the charge indicator lights will turn on and start scrolling. This will last for about 90 seconds while the charger is assessing how much charge the Eargo devices have left. This way the charger will know if it should charge the devices full blast, or just gently trickle charge them.
After this assessment period, the lights will show how much juice you have in each Eargo (1 to 4 lights) and will dim after approximately 10 seconds.
It takes approximately 6 hours to fully charge your Eargo devices and a full charge will give you up to 16 hours of use.
Keywords: charger, scrolling lights, charge, charging, charge time, use time
Source: Charger Guide
User Guide Part #: LBL0025