An update:
I've tried cleaning this mod, restored it to default theme, restored default settings, applied latest service pack. It didn't help. Mod still drains my battery (100 to 60% in about 24 hours). Nor mod, or battery is heating up while idle (according to escribe, board temp. is 26 cel., while room temp. - 22).
I've also noticed some strange behaviour from the board, so guys, please confirm is it normal for DNA75C. When battery is removed, time and date restores to default (2000-01-01 00:01) immediately.
EDIT: also, mod can't connect to PC with battery removed.