Never change a battery unattended.And always change the battery outdoors.
Sounds like storing gasoline in to apartment. And don’t smoke while you are leaning over a gas pump.
So is the root cause operator error, or bad batteries?
Why not take a page out of the lawfare book and sue the merchant?
If one can sue the merchant that sold a gun used in a crime, why not sue the online store that sold the illegal, unregulated battery?
Or sue the idiot that installed it improperly?