Most of the time batteries for an electronic lock may be located within the cover of the lock itself so you will have to remove the lock cover in order to do so.
Keypad door lock change battery.
Mount the keyless entry door lock keypad hold the keyless entry door lock keypad upright and slide the battery cable over the top of the dead bolt and the driver bar through the center slot of the dead bolt.
Pull out the aaa batteries from the lock and install new aaa batteries.
This video shows you how the low battery indicators work on the schlage keypad entry auto lock fe575 keypad entry flex lock fe595 and keypad deadbolt b.
Install a new battery onto the wire cap and carefully insert the battery back into the compartment.