I've owned this August lock for about a month now.  Twice now, without warning, I've lost connectivity to the lock and connect.  Turns out the batteries were dead.  I replaced them and less than a week later the batteries died again.  I'd assume I would see a notice that I needed to replace batteries, but I didn't.  I have now read that the mounting plate might have been too tight so hopefully now that I've loosened it the batteries will last closer to 6 months.  If not I'll be looking for a refund.