FireAngel HT-630R Thermistek Heat Alarm with 10-year lifetime battery | DIY at B&Q
FireAngel Heat Alarm with 10 Year Sealed For Life Battery, FA6720-R & FireAngel Optical Smoke Alarm with 5 Year Replaceable Batteries, FA6615-R (ST-625 replacement, new gen) : Amazon.co.uk: DIY & Tools