Screw in, not out, the locking screw on the back of the housing with the included Allen key.
Remove the housing and replace the battery, type CR123A (3V) (see recommended manufacturers).
Replace the housing and tighten the locking screw.
To maintain weather resistance for the outdoor version of Parakey Door Handle, the locking screw with accompanying seals must be replaced. Contact Parakey at [email protected] to order a seal kit.