I don't own one, nor will I ever own one. I believe the primitive black powder hunting era ended with the advent of the inline , which is essentially a centerfire with out a cartridge . That said, nothing the OP listed couldn't happen with a percussion or Flintlock or an inline, except for the battery leaking. If I ever did lose my mind and buy one, it would not be stored with the battery in it and I would test the battery each time I reinstalled it. No matter what you use, if something can go wrong, eventually, it most likely will. PA had to pass a new law to allow the electric ignition guns to be used in the state and PA also does not allow inlines in their traditional Flintlock season, they must be used in the muzzleloader season which includes percussion, flintlock and inline guns which is a doe season only.