Solar Powered Dashcam
Baseus’ solar-powered dash cam keeps an eye on your parked car for up to two weeks
The PrimeTrip VD1 Pro includes both a rechargeable battery and a high-efficiency solar panel it uses to record incidents when motion or impacts are detected for up to 14 days while your car is parked, without draining your vehicle’s battery.
I think that this is a pretty practical idea, especially if you travel and tend to leave your car at the airport for any length of time.