If I use the box from compactflash, do I just leave the box on when I start taping, even if I have a full charge on the microtrack? I need to record about 3.5 hours at 16/44, using a 2gb CF and a 1gb CF. My fear is the battery on the MT dying on me towards the end. I have the box as a backup, but do I keep it plugged in, but switched off until the charge on the MT starts to die, or what? I need help asap....I am catching a flight first thing in the morning to record a show tomorrow night!!!