The best smart locks have long been a useful tool, but one of the biggest issues hampering their adoption has been battery life. Unlike most other smart home devices, smart locks have to operate without being plugged in, which means you have to change or recharge their batteries on a regular basis.
Now it seems that issue is being solved. I recently tested two smart locks that have solar panels built right into them. That means you never have to worry about your lock running out of juice and having to find an external power bank or the physical keys in order to do something as simple as get inside your own home.