would something like this work as a battery booster?
DC 12V 9800mAh Super Rechargeable Lithium-ion Battery - eBay (item 220740015259 end time Mar-17-11 02:30:22 PDT)
plug into the cigarette lighter to help keep the alternator off for a while,
the only thing i can think off that it wouldn't work is the output voltage,12.6-10.8, but one can always add a dc to dc converter to get higher voltage
it provides about 125 watts, that would take off 250 watts from the alternator, thats a third of a horsepower.not too bad
and it weighs only one pound
what do you guys think?