I don't so much intend to replace them as much as just moving it to another rifle at some point. The shotgun I just bought has not sight of any kind on it. I'd like to get a SD type sight for it soon but I just bought the shotgun and a new computer so I'll have to wait a bit maybe. I need something. But for true CQB for which the shotgun is intended point shooting should suffice if the sight should fail at least for now. I can do that fairly well. I don't know that everyone can - trust me there's plenty I can't do so I'm not talking myself up here. That's just one of the gifts God has given me. I'd trade it for some others I can think of.

What you're saying is why I questioned the value of going with the more expensive version of the PA sight. Battery life isn't all that important for shooting practice which is what I need to do with the gun for now if I expect to use it for SD later.