I have four different Ring cameras at my house. The doorbell cam is battery-powered, but it draws enough from the doorbell circuit that it only uses the battery as a backup.
I have a floodlight cam on the garage side of the house. It uses a wireless connection, but pulls its power from the lighting circuit. The sensor for the light isn't the same as the sensor for the camera, so you can have the lights be more sensitive without throwing an alarm every time it lights up.
The camera that the squirrel knocked off was a battery-powered camera. It uses the same battery packs as the doorbell cam, but it has slots for two of them so you can take one out to charge. (I bought a third battery pack, so I always have one ready.) The charging circuitry is built into the battery packs, so they charge with micro USB cable. They also have an optional solar panel for this camera,
The cam on my back deck is basically the same as the squirrel cam, but it has a permanently attached, really long 120VAC power cord.
For $100/year, you get unlimited storage for your security footage with access via the Ring app. I have it on my iPhone and iPad, and there's a Windows 10 app you can get from the Microsoft Store (which I also have).
You can also get an actual alarm system from Ring. I'm pretty sure the monitoring service for the alarm is included in that $100/year,
Ring also has a Neighborhood feature, where people with Ring cameras near you can post videos their Ring cameras have taken. I've seen quite a few; sometimes it's suspicious people, but just as often it's found pets. Heck, not long ago, someone posted a Silver Alert, which turned out to be a former coworker. (That was bizarre, let me tell you.)