Hi Listers,

        thanks to this list I carry a tiny booster battery that also serves as a flash light and device charger.  I have not had to use it on my van yet.  but, I’m now confident it would work. 
        We just returned from a amazing outing camping at a folk concert and found my girlfriends car battery dead. 
        I remembered the device and she read the instructions  and I turned it on.  she matched the colors of the clips.  and as the directions indicated she tightened key and launched vehicle!  and sure enough it had the magical effect the instructions promised. 

so thanks folks for this great recommendation.

Eric Caron 
85 GL Auto Westfalia 
Still launching at the tightening of each key.  and, it is a magical effect!