If your smoke alarm is up high and you can’t reach it, carefully stand on a sturdy chair to push the button. If there’s anyone else with you, have them spot you while you’re on the chair.
If you can’t get the cover off with your finger, try using a flathead screwdriver to pry it off.
If you can’t reach the alarms, stand on a sturdy chair to take them down. Ask someone to spot you while you are up on the chair.
You may need to press and hold the reset button on your smoke alarm after you change the batteries.