Right because a hotel where the batteries are regularly changed and serviced on interior climate controlled doors is the same situation as a smart lock on an exterior home door that is the first surface to conduct cold from the outside in general and far more rapidly in the event of a power outage...

Also, welcome to Canada where your 0F is not cold... it's -17C and is rookie numbers when you can get -30 to -50 in many locations on the regular in winter. Winter... where the storms can often knock out your power when you're not expecting it for prolonged durations.

So how about you stop spouting garbage because smart locks are not fool proof systems in all saturations and locations and people should be thinking of these things when relying on them solely as methods of entering their home.