Start off by using your door or admin code to open the door and replace the 9V battery behind the flap.

If the display does not turn on for you to enter a code you can plug a new 9V battery into the external port (on the bottom of the lockbox) then use your vendor/door code to open the box and replace the old battery. The video below shows you how this works step by step. 

We recommend using lithium ion instead of alkaline batteries as they last longer and hold up better in extreme temperatures.

Looking to change the battery for a SentriLock lockbox instead? Click here

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