After leaving Vera for Hubitat in March been looking for a way to get some sort of use out of this overpriced $300 device and I finally came up with a great use case for the (no longer needed) VeraSecure.
The VeraSecure has an internal battery that is supposed to provide 4 hours of power to the Vera without electricity. VeraSecure also has a USB 2.0 port. I happen to have a USB adapter turning one USB into 4 power USB ports. So now I can use USB to power all 3 (2 at the moment) of my Hubitat Hubs, and in the event of an electricity outage Hubitats will have their own UPS now.
After initial testing I get just over 2 hours with 2 hubs and the Vera powered up on battery power.
Now if someone smart enough could create a hubconnect way to use the built in siren from this my goal would be complete.