![Kidde Fyrnetics KF20 Firex White Mains Optical Smoke Alarm With Hush, Mounting Plate & Alkaline Battery Back-Up 230V - Shop4 Electrical Kidde Fyrnetics KF20 Firex White Mains Optical Smoke Alarm With Hush, Mounting Plate & Alkaline Battery Back-Up 230V - Shop4 Electrical](https://shop4electrical.co.uk/665967-medium_default/kidde-fyrnetics-kf20-firex-white-mains-optical-smoke-alarm-with-hush-mounting-plate-alkaline-battery-back-up-230v.jpg)
Kidde Fyrnetics KF20 Firex White Mains Optical Smoke Alarm With Hush, Mounting Plate & Alkaline Battery Back-Up 230V - Shop4 Electrical
![Kidde Firex KF10R Mains Powered Ionisation Smoke Alarm with Rechargeable Lithium Back-Up Battery | Safe Fire Direct | Safe Fire Direct Kidde Firex KF10R Mains Powered Ionisation Smoke Alarm with Rechargeable Lithium Back-Up Battery | Safe Fire Direct | Safe Fire Direct](https://www.safefiredirect.co.uk/media/mf_webp/jpg/media/catalog/product/cache/bd5d3d9115be203fb01d48aa828fa9b2/1/0/10208_2nd.webp)
Kidde Firex KF10R Mains Powered Ionisation Smoke Alarm with Rechargeable Lithium Back-Up Battery | Safe Fire Direct | Safe Fire Direct
![Kidde Firex Smoke Detector, Hardwired with nine-V Battery Backup & Front-Load Battery Door, Smoke Alarm, 4-Pack 21030967 - The Home Depot Kidde Firex Smoke Detector, Hardwired with nine-V Battery Backup & Front-Load Battery Door, Smoke Alarm, 4-Pack 21030967 - The Home Depot](https://images.thdstatic.com/productImages/696f1712-104d-406d-8364-20abad36828f/svn/kidde-hardwired-smoke-detectors-21030967-1f_600.jpg)
Kidde Firex Smoke Detector, Hardwired with nine-V Battery Backup & Front-Load Battery Door, Smoke Alarm, 4-Pack 21030967 - The Home Depot
![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
![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)