chrisxowoq5 years ago000Hello How does the door open if the Nuki smart Lock 2.0 device runs out of battery while I am away?Show in original language (French)kedwards5 years ago • purchased this product+1+10purchased this productYou must have your key. However, your phone app will warn you well in advance when the batteries are low. I highly recommend you have 2 sets of the suggested Panasonic eneloop pro rechargeable.Show in original language (French)Comment