Change smoke detector battery

My smoke detector  beeped and chirped every 10 minutes. I realized  the battery of smoke detector is low. Batteries should be replaced twice a year, once in the spring and once in the fall. I found once per year is still fine.

After I  replaced 9V smoke detector battery, I pressed test button and hold a few seconds. No sound! This is due to that the battery is not connected well. Finally I  pushed the battery very hard  to fit the connector. At the beginning there  is a beep sound then stop. I pressed the test button. I can hear the chirp sound. The smoke detector battery is changed successfully.