The smart lock battery can be used for about one year.
Smart locks are mainly powered by 5V batteries. The number of batteries in the battery box is 4 pcs. There are also designs that can hold eight batteries. Generally, it can be opened 20 times a day and can be used for about one year.
Many smart locks have a low battery alarm, that is, when the battery is almost dead, the voice and display screen will tell you that the battery is low, and the battery should be replaced as soon as possible. Note that when replacing batteries, battery brands and old & new batteries cannot be mixed.