Deta 1165 Heat Alarm 240V with 9V Replaceable Battery Back Up (White) : Amazon.co.uk: DIY & Tools
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uk - Does my smoke alarm battery need replacing? - Home Improvement Stack Exchange
Deta 1111 Ionisation Alarm 230V
Long shot but does anyone know what battery this alarm takes? My flat mate is out getting some and I can't check as I can't use our ladder without someone holding it. : r/firealarms
uk - Does my smoke alarm battery need replacing? - Home Improvement Stack Exchange
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