I have one of these with a CF mod. Without the mod the batteries last about last about 45 minutes after the mod they are good for at least 6 hours(enough to fill my 2gb card twice and still have power left). The recorder creates a new wav file for each 15 minutes of recording. They can be seamlessly (no missing samples) joined in a wav editing program. With a firmware upgrade, it does have recording level meters. It sounds great when recording from another audio source, but when I record with my battery box/mics there seems to be some background noise and very low levels...compared to my Iriver. Maybe a preamp or more sensitive mics would give better results?