Do people not understand all you need to do is remove the battery from the alarm and disconnect it from any power cables to make it stop beeping

It usually beeps like that because the battety is dying… Just change the battery!

It may be beeping because it’s past its 10 year working period. Some are programmed to beep continuously after 10 years to signal replacement needed.

Even if they’re permanently wired in with a Li-ion backup battery. I get why they do it, but realistically they’re probably good for longer?

Most of the ones that exhibit that behavior are the types that relay on radioactive decay. decay being the key word there. They get less radioactive over time and need to be replaced.