Cameras only work while plugged in

[AprilH]

All 4 of my cameras have stopped working unless they are plugged in. I have tried everything I can find online and nothing helps. I have reset the base stations, replaced network cord, made sure all batteries charged for 8+ hours, etc. I have removed all devices on the app and re-added them. They all reconnect and work while plugged in but says “Your Arlo device appears offline” as soon as they are removed from the battery. I feared a bad battery but can’t imagine this happening to all 4 at once. Any help is appreciated!

[Dannybear]

I suggest that the batteries in the cameras have gone completely flat and so will not charge, hence the issue.
If you have a known good battery you can swap it out to prove.
There is a requirement to recharge batteries before they go completely flat. You can try re-priming them by unplugging and replugging them with power every hour or so to make them start taking charge.
Make sure your using the correct charger adapter.

[jguerdat]

The attempt to get enough charge in the battery to allow a proper charge shouldn't need an hour between attempts - if the blue LED indicating "charge" comes on, that would be the signal. Yes, charge proactively.

Since this is for the Pro 1 cameras, be sure the charger is the one that has both 5V and 9V outputs.