Local range had a "free rental" day for "members." Had to buy their ammo to shoot in their guns, but it was not terribly expensive.
So I picked a Kimber 9mm with a slide mounted red dot sight. Sorry, I don't remember the brand.
You (or at least I) cannot expect to pick one of these things up and do good work with it.
I was pulling shots low left like a new Glock owner. I finally realized I was snatching at the trigger when the dot looked right.
I could slow way down and hit but that is not what a "carry optic" is for.
I can do ok with an elderly Tasco on my even more elderly High Standard at Steel Challenge, but a centerfire on a silhouette was a different proposition.
So expect to have to put in a good deal of practice with your new battery sight.
I also found the cow witness iron sights in the window to be a distraction. I know one guy who has gone pure CO for that reason.
I got out my iron sight gun and shot normally with it, so CO is not on my planning horizon.