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The Yale Real Living B1L Push Button Deadbolt (YRD110) requires four AA Alkaline batteries.
To replace the batteries in a Yale Real Living B1L Push Button Deadbolt (YRD110):
- Remove the battery cover.
 
 
- Verify the bolt is in the unlocked position.
 
 
- Insert four new AA batteries.
 
 
- Reinstall the battery cover.
