The short story is, its easier to jump down, rather the jumping up. I've never jumped anything with either of my MEP 002a or 003a. Since they're older, both have the double pin slave that matches the rest of my stuff (maybe I'm dating things here)[I too, have the single pin adapter}. I don't doubt that one MEP can jump another, but it would seem mostly your going to be reliant on the state of your battery packs, since the charging systems of especially the older ones, while its adequate for themselves, they don't produce a lot of surplus. The 002's also use a much smaller battery pack. As it is, I never felt it prudent to be stingy with the quality of the batteries in especially the 002's, when considering that its something of an emergency unit.