Pro 4 battery

[Pmsimon]

How do I know when my Arlo Pro 4 is fully charged

[JamesC]

Pmsimon,

When the camera is plugged in, a solid blue LED will indicate a full battery charge.

JamesC

[Pmsimon]

How How long does it take the battery to charge and how do I know it’s fully charged

[jguerdat]

As noted in your other post, the blue LED will light, indicating full charge. This assumes you haven't turned it off in the camera settings. Charging time is +/-3 hours.