i have the mpio fl100 and that thing eats batteries, but i put some duracell rechargables, and its fine.....how long does it take you to transfer songs onto your mp3 player? it shouldnt take longer than 30 seconds for most songs... i think its a feature on mp3 players, i know mine i cant take the battery out because you need to turn it on to connect..my freinds recharges from the computer...its weird but i think its all on the design of the mp3 player