After getting used to the Archos MP3 Recorder and the Apple iPod, I'm not used to having a player that just keeps playing and playing. With both the Archos and iPod I had to charge them often, every 9 to 10 hours of listening. But I'm being pleasantly surprised by my Sony MZ-N707 Minidisc player/recorder. I put in a single Energizer e2 Titanium AA cell into the player more than three weeks ago and the thing still plays -- the power bar still reads full charge. This is with at least an hour a day listening. Not bad at all. I am impressed.