I agree glassdoctor. I saw those "booster" thingies and immediately thought that it was really not a good idea. It reminded me of this:
http://www.unbelievablerc.com/detail.php?pid=8
Yes. The right solution is to get the proper number of cells. Doing all that stuff to insure proper current flow, and then stick a 10% loss in the line just doesn't make sense to me...just my $0.02.