Would depend highly on the camera you have to be able to determine what its operating parameters are. My Thinkware F770 2CH uses a switched and perm live, one for continues driving which turns on when the switched fuse becomes live, the other is power during parking mode. The camera has a iPhone app that allows me to change the settings of the battery drop level, so when the camera detects the cars battery is below 11volts say, it shuts down. I haven't tested the longevity of parking mode, i have my camera set to shut off after 24 hours as i don't foresee myself not driving it for longer than that, parked in a place where I'm concerned. When the car is in a compound for 2 weeks over a holiday break, i don't know if any camera will support that length of time!