Product review (1 stars): Battery contacts rusted out, threw it away
bought this a couple of years ago; It stopped working recently. I took the outside unit apart and the battery area was all rusted out.  Had to throw it away.  It was NOT out in the rain; it was under a porch roof not even close to water or rain.  And it was NOT a faulty battery, or leaking battery.  Jusy cheap grade metal in the contacts.