In the instructions for this unit, it explains that when battery gets to almost dead, the unit will cycle the lock when you open the door with key pad

This product worked as I expected, as the other reviews state, the one bad part, battery is not replaceable

The fact that the battery isn't replaceable is not a deal breaker for me.

Once the batteries are dead then the unit needs to be replaced

Althoughyou will be told the battery is not replaceable, it actually is.

The reason for the lack of five stars is that the batteries are not replaceable.

Supplies you will need: the battery, a thin, but stiff and strong metal blade - not sharp (I used a 1 1/2" metal putty knife (pk)), a heavy plastic putty knife with a tapered working edge, heavy duty double sided foam tape, small screw driver or key (for removing battery from its housing), adhesive remover and a rag.i) Remove the kp from its mounting position.

The only drawback is that the batteries are not easily replaceable.

product has a one year warranty and the battery is not replaceable

I've own this for 2.5 years and the battery is still going strong

This made me think at first that the battery was dead, but it was not.2