Batteries in all smoke detectors need to be changed out simultaneously, preferably twice a year. Dust and dirt buildup also affects how well the units operate, so clean your smoke detectors thoroughly when you change out the batteries. Additionally, smoke detectors have a life span of around ten years.
If your home is close to this age, you can remove one of your smoke detectors and see the manufacture date on the back label. If the detector is nearly ten years old or older, you may need to replace the detector(s).
If the problem persists, contact the fire administration office at 214-975-0420 during normal business hours. After hours, call LEPD non-emergency 214-975-0460.