That's one of the areas where the Vico Power-Plus shines.
The cutoff voltage can be set to a value of between 11.4V and 12.6V in .2V increments.
The resting voltage for all three of my vehicles is in the 12.6V area. I set the Power-Plus to cutoff at 12.2V and have never had a problem with starting the vehicles.
As to the concern of a Dashcam lessening the life of a battery, I do not think that the Dashcam does that any more than the myriad of electronic drains (Clock, Radio Memory, etc.) that are placed on the battery. If a reasonable voltage is selected, and deep discharge is avoided, the battery can handle the situation.
RodeoGeorge