This is interesting from the FAA about TWC’s IBBS..

[hammdo]

https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID137303780920240213191443.0001?modalOpened=true

-Don

[LANCECASPER]

At first when I saw this thread I thought Time Warner Cable (TWC) had Irritable Bowel Syndrome (IBS)

But I think this is the product they are referring to: https://www.edmo.com/product/12V3AH/Integrated-Battery-Back-up-System-IBBS-12V-3AH

 

(Of course come to think of it, in dealing with TWC customer service over the years, IBS might explain a lot.)

[Pinecone]

The bulletin does not state that there have been any such events.

[LANCECASPER]

In 2021 when I was doing a panel upgrade on a Bravo I had, Aspen was pushing me to get rid of the big backup battery that was installed in my airplane and go with the new small backup battery. I did that and saved a pound or two and the batteries were going to be less expensive for the future, but the potential  failure mode of the old style battery might have been why they were pushing it.