[telemarker (Keith)]

I have an ACK-2E AC power supply for my 20D and wondering about using the DR-400 part with a step down from a 12v jumper battery for imaging at remote locations. Specifically, I was wondering whether a Nokia car charger could be used as I have a few of these lying around. A multimeter indicates it gives two voltages (6.7 and 8.3 volts) when hooked up to a jumper battery. Anyone tried this, or anyone with sufficient knowledge care to pooh pooh the idea.