Deta 1163 Optical Smoke Alarm 240V with 9V Replaceable Battery Back Up (White) : Amazon.co.uk: DIY & Tools
Deta 1151 Mains Powered Ionisation Smoke Alarm with 9V Battery Back Up & Integral Base, TV & Home Appliances, Electrical, Adaptors & Sockets on Carousell
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My Smoke Detector Is Leaking Water | Hunker
DBM] Deta 1111 Smoke Alarm Ionisation Mains / 9V Battery Back Up – Switch My Sockets