This is a question for any other Zen Micro owners out there. Have you tried using your player with headphones other than the supplied ones and have you noticed that you need to almost triple the volume to get a similar volume level? I first noticed this on a flight when trying to use my noise cancelling 'phones, a pair of Sennheiser 485's. Ok so an aircraft isn't exactly a "quiet" environment, but having to set the volume to 21 rather than 6 to hear something seemed a bit extreme to me. Back on terra firma, I tried my trusty old HD450's with the same result and checked out a colleagues pair of "in ear" Sony's (don't recall the model number). Same story, with the Creative headphones 6 or 7 is a nice comfortable level, any other headphones and you need 20 or above. This seems a little bit naughty of Creative, I'm guessing here but it's almost as though they've supplied a truly "hyper sensitive" pair of 'phones so that under normal listening, the Zen will use less juice. I'd be interested to know what the specs for the 'phones are, am I right in thinking that generally most 'phones are 32ohms impedance (not sure about the sensitivity)?? On the plus side, with only WMA files and the player not quite fully charged, I did manage to get over 11hrs out of one battery. This was a random play all with the lock engaged, based on this I'm very happy with the battery life (the fact that mine was one of the limited edition models with an extra battery didn't hurt either).