Good points
Mostly bumping to hijack so probably 4 car lengths and then licence plate reading at some point. (a guess)
Bug splat ?
12v rechargable whatever type is applicable (with advisement)
This assembly would be removed when car parked so I know it would be obvious
It would only be used on local trips to stores or 1 hour and then erased if no issue
There may be a time visiting inlaws 4 hrs I think that may be asking too much.
Thank you for your response
colum
So, go out and buy one suitable for an automobile.
There are units with front and rear facing cameras, some with both in the same package for low cost, maybe $40.00 or less.
Most will have "sugar cube" size camera which is almost undetectable if mounted near your rear number plate.
Some are even "wireless".
They will have all the necessary included such as sd recording.
SD card to suit will be almost, if not more than the unit itself.
This is because the required type sd card needs to be one that withstands continuous "writing and re-writing" to memory.
Run it off a 3s LiPo if you must but I don't see the point in introducing yet another power supply into a vehicle.