2022/7/20 · Less prone to nuisance alarms from cooking fumes with a toast-proof optical smoke sensor. Ideal for rooms or hallways adjacent to the kitchen area. Standalone Compliant with EN 14604. Standard Replaceable Battery (Alkaline) 85dBA Alarm at 3m Test/Hush

The alarm says "Warning battery not replaceable". I've tried the reset but it doesn't seem to stop it. The only different thing is I had new 

Either FireAngel's FA6620‑R or FA6615‑R smoke alarms can replace your end of life ST‑620 without requiring a new base plate or leaving unsightly holes in your ceiling. Thermoptek The fastest response to all fire types. 10 Year Warranty Manufacturer's warranty for peace of mind. Technology

Replace the battery in the smoke detector located near the door, which is frequently located on the unit's side or rear. Connect the wiring harness to the unit or base, position the unit on the base, and secure it by rotating the unit clockwise. Reset the circuit breaker to restore power to the detector's circuit.

It can crush all kinds of coarse, medium and fine materials (granite, limestone, concrete, etc.) with a feed particle size not exceeding 500mm and a compressive strength not exceeding 350MPa. , Energy, cement, chemical, construction and other industries

It sounds like the rechargeable battery might be low. You could try putting it in the socket and turning the light on and try to charge it. If it is in a socket 

5 Year Replaceable Batteries. Looking for a FireAngel ST‑623E smoke alarm replacement? Replace any end of life alarms with our new FA6611‑R smoke alarm with escape light, perfect

Nuisance Alarms. The FireAngel ST-622 features a Thermoptek sensor which is proven to be less prone to nuisance alarms as a result of cooking and it often referred to as 'toast-proof'. However if your ST-622 smoke alarm does happen to trigger and you are certain there is no smoke present, try taking the following steps.

Replace your end of life ST-620 alarm with a FireAngel FA6615-R Optical Smoke Alarm with 5 year replaceable batteries or FireAngel FA6620-R 

Not suitable for homes in Scotland.CO Alarm - H - 62mm, L - 119mm, D - 38mm. Product weight - 128g. Supplied with 2 x AA Replaceable Batteries. Suitable for 

The FireAngel SB1-T uses high-performance optical smoke-sensing technology making it less prone to false alarms from cooking fumes, which is recommended by British Standard (BS 5839-6) for installation in circulation areas such as hallways and landings.