i have gone through 4 12V batteries. I had my BlackVue 900s installed in July of this year. Late August I had a pop up saying that my 12V battery needed service to replace the battery soon. Took the car into Tesla Service Tyson's, Va. and they replaced the battery. Two weeks later the warning popped up again. Back to Tyson"s, and they replaced the battery thinking it might of been a bad battery. Again, the warning popped. Same process. The last time Tyson's dug deeper and found that it was the 900s draining the 12V battery. The BlackVue was set to run 72 hours and apparently the parking mode would kick in all night. So, took the car into the installer of the BlackVue who reduced the run time to 12 hours while in park. This is kind of a test. fingered crossed that it fixes the issue. But, checking TeslaTap I found that the 900s does not work well with the Model 3, and they recommend buying the BlackVue battery at $300.00… Ultimate 2018 Tesla Dashcam Guide | TeslaTap this article is very good about a number of different Dashcams and impacts. It’s not just the 3s with issues there’s even issues with the BlackVue and Models S & X.