You can tinker with how much power the camera consumes in the app. I changed the setting to Low, which is for cars that are driven infrequently and for batteries that are older than three years. High uses more power. The Car Cam won’t turn itself off as quickly, but you’ll need to drive more often to keep it charged. (There’s a Medium option too.)
Ring does note that ideally you’d drive your car at highway speeds at least once a day to fully recharge your battery. I don’t live near a highway, and I rarely drive over 40 miles per hour. My car battery is older than three years, but I haven’t had any other issues. My check engine light isn’t even on.
I installed the Car Cam around lunchtime. By 11 pm that night, the Ring app pinged me that my car battery was on the verge of being drained completely, so I ran out and unplugged it.
Having an unplugged Car Cam gave rise to another problem. You can only access the videos if the Car Cam is on. If it’s unplugged, you can’t see any of the videos in the app, even to look at the event history. I had to walk out of my house, sit in my car, turn it on, plug the Car Cam back in, and scroll on my phone. It's a difficult process to replicate with an insurance adjuster.
As far as the camera view goes, the interior field of view is decent. It encompasses the entire breadth of my car, and I can clearly see my children in the backseat. Motion notifications seemed accurate. When the Car Cam is briefly on while the car is stationary, I only get notified when my family is getting in and out of the car, never for the mail carrier on the sidewalk or the neighborhood cat that likes to bug my dog. However, the front view camera is lacking. It's too blurry to make out license plates, even when I pulled up about 6 feet behind my other car. That defeats another reason to have a dash cam, which is to record information in case of an accident.
Finally, you can technically use the Car Cam without a subscription, but if you want to be able to access certain features—like, say, watching your video over LTE and storing Live View events or the beginning of Motion events in the cloud—you have to subscribe to Ring Protect Go for $6 per month.
There are two specific use cases I can see the Car Cam being useful. The first is if you’re a rideshare driver. Your car is frequently running at highway speeds, and you have a way to make sure your customers don’t try to assault you. However, in my state it’s illegal to record people speaking without their consent, so most of the time the Car Cam’s privacy shutters would have to be on, and you’d have to notify your customers when you start recording. The second case is for law enforcement interactions, but the camera will stop recording if the officers ask you to turn off your car, which they probably will.
I’m not opposed to the use of a dash camera at all. Although I don’t generally have cameras in the interior of my house, I concede that the outdoor space is public. I have a video doorbell so I can check for packages and a garage video camera so I can make sure the trash service actually came. But as far as car cameras go, this one was not it. I can’t imagine paying $250 for a device that doesn’t do anything I want it to do. I’ve never been happier to return anything in my life.