The Spy Tec A119 has been real reliable. Also under the brand name Viofo. In all our company cars. It uses a capacitor battery that can handle much higher temps than a lithium powered dash came - only an issue in extreme temp regions like the Desert. Over 2 years and no issues with any of the cameras.
Another good choice it seems is the Yi Dash cam. It has wifi connectivity.
But, for price and clarity of picture day and night, the Spy Tec A119 is the best deal in my mind. Check out Car Cam Central for reviews.
https://www.youtube.com/user/CarCamCentral
Thank you...
Checking it out.