This Arlo device is offline on all cameras. Reset modem/router, power cycled Base Station.

[lowpro]

Why are all of my cameras offline? I’ve reset my modem, router and power cycled my base station and one of the five cameras. Nothing changed. I have internet working and a WiFi signal from the base station. Each camera flashes a rapid amber led twice every 17 seconds. I’ve never had all batteries go out at the same time. We have all red surefire in them which in the past gave us great service.

[jguerdat]

Test the batteries with a voltmeter. ANything approaching 2.75v is dead. The amber flashes imply low batteries.  If the base is off or isn't connecting with the cameras somehow, the batteries will drain quickly. What are the LEDs on the base showing?