I'm about to install a Next Base 312GW dashcam in Management's car and
am not sure on whether I should connect it to a permanently-on source or
one which is live only when the ignition is turned on.

The car is parked on the drive overnight, so it would be useful to have
a recording of anyone messing with it, and the local supermarket seems
to collect drivers who think they're auditioning for some kind of
demolition derby.

If I was to wire it permanently-on, what would the downsides, other than
an eventually flat battery, be?

I should add that it does have a 'parking mode' that responds to
movement, but that needs to be set manually each time the car is parked,
something I'm not sure might happen...

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F