The way reflex sight work, with a mirrored surface of some sort, makes that difficult if not impossible. Prism sights OTOH, are more like a scope, with a reticle etched on glass, that works with or without the juice on. Their weakness is a limited eye-relief.
Been using various red dots since my first FastFire, maybe 20 years or so. Only once have I had a dead battery, with that first one. Almost all now have long battery life and either a timed auto-off feature, motion sensor, or maybe both. New ones also have battery caps that don’t require unmounting the sight.
A couple cheap Bushnell Trophy models died, a crap design from the getgo, and one Sparc 2 died from recoil on a revolver, a manufacturing defect. I simply don’t fret about it. I change batteries perhaps once a year whether they need it or not. I have two S&W pistols that co-witness from the factory, and another on the way. That makes sense for a defense piece. For hunting or targets, meh.
