i dunno.. 25a is a pretty decent charge rate. a couple hours of that and unless it was a stone dead battery it should kick off..hope ya got the time to wait!
Yeah 25 amps is a decent charge rate if it was that but I highly doubt it would be anywhere near that through 20 feet of 18 ga wire and 2 cigarette lighter plug ins etc, its probably more like .5 amp to 1 amp just guessing.
The HD zoner cables you started this thread about would be a heck of a lot better using them to do the same thing just battery to battery and running the donor car as long as it took to get it to start on its own. jmo