Re: Smoke detectors – beeping every 30 seconds flat battery warning › Flat Chat Strata Forum › Neighbour noise › Smoke detectors – beeping every 30 seconds flat battery warning › Current Page 13/12/2017 at 10:49 am #28858 ChoiceFlatchatter You will have to find the source of the noise before proceeding I think. If it was a smoke detector warning you’d think that it would annoy the occupier of the unit and they would change it. Might be something else causing the beeping.