I agree ..... I've gone a full 10+ hour day on my LX-7 many times and never had the battery run down. I've always charged it over night so I don't know how long it would go the 2nd day, but 1 day is no problem.
I think the same thing about the LX-6 too, since the screen is smaller it seems like it would draw fewer amps, but I haven't used one on the ice so I can't say for sure.