in the snow at the ski area last night, afraid to leave the vehicle.
That's why I carry a jump box. (just another part of my gear that always stays in the truck)
1 i don't like hooking my truck to anyone else's because you never know how or what they have hooked up or what's messing up their system to need a jump.
2 for issues like yours I would have gone skiing and not worried because I have my own jump in the back.
3 (it has usb power ports) good for charging phones, tablets and such when camping or power out in the house. just all around useful thing to have.