![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
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Kidde Firex KF20 Optical Smoke Alarm - Mains Operated with Battery Back Up : Amazon.co.uk: DIY & Tools
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How To Change Battery in Kidde Smoke Alarm - KF10 - KF20 - KF30 - Fix Beeping Smoke Alarm Problem - YouTube
![Kidde Firex KF10 Mains Ionisation Smoke Alarm with 9v Back-Up Battery | Safe Fire Direct | Safe Fire Direct Kidde Firex KF10 Mains Ionisation Smoke Alarm with 9v Back-Up Battery | Safe Fire Direct | Safe Fire Direct](https://www.safefiredirect.co.uk/media/mf_webp/jpg/media/catalog/product/cache/bd5d3d9115be203fb01d48aa828fa9b2/1/0/10940_2nd.webp)
Kidde Firex KF10 Mains Ionisation Smoke Alarm with 9v Back-Up Battery | Safe Fire Direct | Safe Fire Direct
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AC Hardwired InterconnectedShop Smoke Alarms, Carbon Monoxide Detectors, Combo Alarms, Fire Extinguishers - By Kidde
![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)