The Microtrack uses CompactFlash cards to record, so this should not consume any more power than the Zoom. Everyone relating their experience has stated that their Microtrack originally delivered 3 to 4 hours of record time, then after a year or so it degraded to less than an hour.
-- Optimism and pessimism don't exist for me. I'm a blues man. I am a prisoner of hope. I'm going to die full of hope. - Cornel West