I have had this keyless lock since Dec 2020, about a year and half.  During this time, the batteries have died every 1-2 months.  The batteries die unexpectedly, so I cannot truly go keyless because I will find myself locked out.  I have followed all of the recommendations to get the best battery life.  The manufacturer says batteries should last at least a year; this is completely inaccurate.  I do not recommend this product if you want a keyless lock that you can depend on.