![This heat detector in my house started beeping this morning. I tried to remove it to replace the batteries, but I have no clue what's going on in here. Is it safe This heat detector in my house started beeping this morning. I tried to remove it to replace the batteries, but I have no clue what's going on in here. Is it safe](https://preview.redd.it/s7bxl8igrr281.jpg?width=3024&format=pjpg&auto=webp&s=1ac8af0ad41f00ee81120e5fce775579c31346ba)
This heat detector in my house started beeping this morning. I tried to remove it to replace the batteries, but I have no clue what's going on in here. Is it safe
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Kidde Fyrnetics 3SFWR Slick Mains Heat Alarm With Built-In 10 Year Rechargeable Lithium Battery, Fast Fit Mounting Plate & Remote Control Functionality 230V - Shop4 Electrical
![Kidde Fyrnetics 3SFW Slick Mains Heat Alarm With Loose 6 Year Alkaline Battery, Fast Fit Mounting Plate & Remote Control Functionality 230V - Shop4 Electrical Kidde Fyrnetics 3SFW Slick Mains Heat Alarm With Loose 6 Year Alkaline Battery, Fast Fit Mounting Plate & Remote Control Functionality 230V - Shop4 Electrical](https://shop4electrical.co.uk/655927-home_default/kidde-fyrnetics-3sfw-slick-mains-heat-alarm-with-loose-6-year-alkaline-battery-fast-fit-mounting-plate-remote-control-functionality-230v.jpg)