Wyze lock became erratic. Loose batteries. Fixed

My Wyze lock kept failing, deprogramming itself, and it was erratic in attempts to recalibrate it.

I located a problem in the batteries. They were just loose enough to make the connection insecure.

I stretched out the spring in the battery holder and made a small extender out of aluminum foil for that end. Result: The batteries sit firmly in place.

So far, the problem has not returned.