To change the battery in your AMSEC safe lock using an Eveready 9V battery (L522BP), follow these steps: Locate the Keypad: Find the keypad on your safe lock. Turn Counterclockwise: Grasp the keypad housing and turn it counterclockwise to expose the battery compartment. Remove Old Battery: Carefully remove the old battery by disconnecting it from the connector. Insert New Battery: Place the new 9V battery into the connector, ensuring it is securely connected. Reattach Keypad: Reorient the keypad and click it firmly back into place.