How To Reset A Smoke Alarm After Changing The Battery. You can calculate the expiration. Replace the new battery in the detector and plug in the power supply.
This will fully reset the smoke alarm and drain any charge. You might still see the message low batt or bat but this is normal for up to 48 hours as the battery is likely charging. It is possible that your smoke alarm silence button was pushed by mistake.
Remove the battery from the smoke detector.
Enter your access code on any console or keypad of the alarm system. Find the device thats going off and reset it by pressing and holding the reset button. Remove the detector from its mounting bracket and unplug the power supply. If your smoke alarm is chirping even though it has a new battery try these troubleshooting steps to clear out residual charge from the old battery.
