You will need four AA batteries to replace the old ones.
Sentry safes with electric locks require batteries. All other Sentry safes require just a key to unlock. If the batteries die, you will have to replace them before you can use the electronic lock to open the safe. Sentry safes use four standard AA alkaline batteries. The batteries are housed on the outside of the safe. If they die, you can open the safe by using the key that came with it and the preprogrammed number dial combination to unlock and open the safe. The combination is printed on the front of the safe's manual. Removing and replacing the batteries is the same for all electronic Sentry safe locks.
Instructions
Changing Batteries
1. Insert the tip of a paper clip or a ballpoint pen into the small hole underneath the safe's keypad. Push inward while sliding the cover to the right.
2. Remove the battery holder cover and set it aside.
3. Remove the old batteries and replace them with four new AA batteries. Make sure you insert them the right way so their plus (+) and minus (-) signs match up. Use the model printed on the plastic battery holder to guide you.
4. Place the battery holder over the batteries and slide it back into place.
Open Safe When Batteries Die
5. Insert the key for the safe into the key slot and turn it clockwise until the safe's plunger pops out. Remove the key. Make sure the dial is set at zero.
6. Turn the numbered dial to the left until you make three rotations. Make sure the safe's marker passes the zero three times.
7. Turn the dial until you reach the first number of the combination. Make sure the safe's arrow is pointing at this number.
8. Turn the dial to the right until you reach the second number of the combination. Stop at this number, making sure the pointer is at the second number of the combination.
9. Turn the dial to the left again until you reach the third number in the combination. Stop at this number, making sure the pointer at the third number of the combination. If there's a fourth number in the combination, turn the dial to the right until you reach the last number in the combination. The safe should open if you entered the right combination.
Tips Warnings
If your Sentry safe has a yellow blinking light, the batteries need to be replaced.
Sentry recommends using only alkaline batteries and not rechargeable ones for its safes.
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