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- Locate the smoke detector.
- Use a small step stool or step ladder to reach the smoke detector.
- Using your fingers open the hatch that is labeled battery.
- Remove the battery taking note of which side the positive and negative terminals are on.
- Replace the battery with a new (not used) 9 Volt battery placing the positive and negative terminals on the same side as the removed battery.
- Close the battery hatch.
- Press and hold the test button on the unit until the smoke detector goes off.