![Hi, I'm going to attempt to replace these Firex smoke detectors myself. can I just buy the most recent model of these and swap them out, leaving all the old wires? Or Hi, I'm going to attempt to replace these Firex smoke detectors myself. can I just buy the most recent model of these and swap them out, leaving all the old wires? Or](https://i.redd.it/7nce6mtqp4ba1.jpg)
Hi, I'm going to attempt to replace these Firex smoke detectors myself. can I just buy the most recent model of these and swap them out, leaving all the old wires? Or
![How To Change Battery in Kidde Smoke Alarm - KF10 - KF20 - KF30 - Fix Beeping Smoke Alarm Problem - YouTube How To Change Battery in Kidde Smoke Alarm - KF10 - KF20 - KF30 - Fix Beeping Smoke Alarm Problem - YouTube](https://i.ytimg.com/vi/2rdLdlcmQvc/maxresdefault.jpg)
How To Change Battery in Kidde Smoke Alarm - KF10 - KF20 - KF30 - Fix Beeping Smoke Alarm Problem - YouTube
![Kidde Firex KF20 Optical Smoke Alarm - Mains Operated with Battery Back Up : Amazon.co.uk: DIY & Tools Kidde Firex KF20 Optical Smoke Alarm - Mains Operated with Battery Back Up : Amazon.co.uk: DIY & Tools](https://m.media-amazon.com/images/I/51ZW94ueGXL._AC_UF894,1000_QL80_.jpg)
Kidde Firex KF20 Optical Smoke Alarm - Mains Operated with Battery Back Up : Amazon.co.uk: DIY & Tools
![Kidde KN-COPE-IC Firex AC/DC Hardwired Combination Carbon Monoxide & Photoelectric Smoke Alarm with Voice Alerts Kidde KN-COPE-IC Firex AC/DC Hardwired Combination Carbon Monoxide & Photoelectric Smoke Alarm with Voice Alerts](https://cdn.adiglobaldistribution.us/pim/500X500/10026/1060289389_lg.jpg)