For LK-7900 Power Magic Pro or LK-350, I have a decent battery, like a upgrade from the Optima, it is Gel and 1000 cranking amps, should I get the LK-530-12V Dash Cam Smart Power Supply Battery as well??peace of mind and all, if I leave car at airport for 3 days?? what then?? (this only once a year, my travel has slowed down)