Matt Hamilton [Maryland] on Nostr: I've never tried the Arlo system, and it's not clear if a subscription is required, ...

I've never tried the Arlo system, and it's not clear if a subscription is required, but it seems like Arlo sells a battery backup and cellular addon: https://www.arlo.com/en-us/accessories.homesecuritysystem/LBB1001-100NAS.html