I have a 12v portable jumper pack I keep in my toolbox in my pick up. It has a 12 V cigarette outlet. Has anyone tried using one of these as a portable charger to get your batteries charged while away from your house or vehicle? I usually use my 12 V adapter in my vehicle to charge my Mavic batteries when out flying. But I’m going ice fishing and wanted to be able to get a couple extra charges. I know they make a portable charging station for the Mavic now that’s like $130. But I wouldn’t use it every day so it’s not worth it for me. Hoping I can just use my jumper pack. Has anyone else tried this? I think I’m going to try today.