TLDR: Its going to depend on how it is used, but a maximum of ten years.
Periodic Deployment/Service Life
BCA recommends deploying your Float airbag at least once per year, both to make sure the system is
operating correctly and to be sure the user knows how to operate the equipment efficiently. Put it on,
pull the trigger, repack the airbag and refill the ...
The correct answer for sure is "it depends on the exact model" but that is quite useless ;)
As far as I can see all the airbag vests deploy over your whole shoulder area. This is definitely not suited for backpacks.
For some avalanche backpacks it is possible to have one airbag unit and multiple matching packs, e.g. Ortovox. I have not done this myself as ...
I can't speak directly to avalanche airbags, but I do have some experience with Fire Shelters, I believe the same considerations apply.
Life expectancy of wilderness survival equipment is not measured by the calendar. It is measured by wear. Safety devices should be inspected at the beginning of every season and regularly throughout the season. One time ...