My last "10 year" FireAngel ST-620 has started the dreaded low battery 'chirps' after 5 years.
Safety and the reliability of the alarm is the prime issue but I decided to replace the battery anyway. This mainly on the basis that the elctronics & sensor should evidently remain serviceable until 2028
UPDATE: Please see this video from ‘Tuna’ for more important details! • ST-622 FireAngel low v...
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Негізгі бет Ғылым және технология FireAngel ST 620 Smoke Alarm Again
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