Review on 🔥 UL Listed Photoelectric Smoke Detectors – 2 Pack Fire Alarms, 9V Battery Operated (10 Year Life Time) by Andre Arias

Cute with a convenient place to put the batteries. They have a smaller footprint than my previous smoke alarms and require new holes in the wall or hanging with a single screw. The problem is that the batteries in all 4 devices I bought died after 6-9 months. It is falsely advertised as 10 year old batteries. All the devices started beeping at about the same time, in the middle of the night of course, and it wasn't a beep every 32 seconds as advertised, but a beep every 5-10 minutes. It was very difficult to find the source of the tweet. I ended up taking them all outside in the middle of the night so I could sleep. In the morning I found that each of them was chirping. I did not test the devices like other reviewers did. After this experience I will test from now on.