Locate the blue installation tool or stiff metal wire like a paper clip. Insert it into the hole on the right side of the battery cover. While inserting, press in the two tabs io the sides and pull the cove up.
Replace with new AA alkaline batteries, do not mix brands. Ensure they are inserted and match the polarity marked.
Slide the battery cover on the guides gently until it locks into place. If there is any pressure sliding the cover down, pull it back up and align it properly on the guides.
To replace your batteries first locate your battery cover removal tool included with your lock.
If you lost the tool no worries, a paperclip will do the trick.
Remove the battery cover on the inside of your door by inserting the tool and sliding upwards.
Replace the batteries with 4 AA Alkaline batteries.
Reinstall the battery cover the opposite of removal.
Note
Avoid using generic branded Alkaline batteries.
Lithium Iron Disulfide Battery Manufacturer Warning
Do not install backwards, charge, put in fire, or mix with other battery types. May explode or leak causing injury