Very nice clip; I too have an A7s and have it set up with a dummy batter, off an inverter, off a car battery (I know it sounds awkward), but the damn camera counts down to battery depletion at about three hours, even though there's no depletion. It is as though it doesn't measure voltage at all, just time! Very very annoying, it's a known issue and I was just wondering if / how you'd worked around it?
