This lock continuously has terrible battery life. My sister, who I bought the lock for as a Christmas gift, went through hoops with support to finally get it replaced under warranty because they were replacing batteries like every 2 weeks.  I'd say that was probably 6 mo or so ago that they got the replacement via warranty and now the battery drain problem has started up again.  I've even gone over there to troubleshoot it a handful of times, did all the support suggested ideas, and it still drains the batteries a ridiculous amount.