We purchased the wireless camera system because we have no way to run wires. Battery life according to the display was up to 6 mod for two batteries, and up yo 1 yr for four batteries. Batteries only lasted 48-72 hrs. I called customer service to complain, and after over2 hrs of going back and forth complaining, they sent new batteries. Same result. I told them that the cameras are not running non stop, but they kept arguing with me. I finally had enough and returned them. Never again will I purchase anything from them!