I have mostly battery operated cameras. 14 total. Several spotlight, a couple of original stickup cams, a couple of newer stickup, 2 doorbells. Most 2 years old or much older, and they are all going strong. I’m not in the camp of “they must be hardwired”. I have a couple of extra batteries and swap them as needed. Saves a lot of wiring hassle and the only camera I’ve ever had go bad was an original doorbell (and TWO power supplies. Lol). Batteries are fine.