Had an eGo style battery with a mini Aerotank 3 (or something like that) which took a 40'+/- fall from a JLG lift when I bent over to get a tool from my tool bag. I learned quick to not carry in my shirt pocket any more.
I know the SS sleeve Vs. the glass would not have made a difference in my case![]()
Yes, I'm sure there are some harsh environment where this would be handy. But not being able to see the juice level with taking it apart would be a PITA. Anytime I leave the house with a PV, I always check the juice level.