Today I tried to open my GunVault, using my push-button code, and the door would not open. I tried several times with no success and then realized the two-year old 9v battery just didn't have enough juice to release the latch. Fortunately, I knew exactly where to find the backup key and used it to open the door. Good thing there was no emergency need for either of my pistols in that safe.
Lesson learned: Replace the battery more often than once every two years.
Lesson learned: Replace the battery more often than once every two years.