Hi all, I'm a complete newbie at doing live recordings. I've got a Sony MZ-R900 MD, and an ECM 719 mic. My question is regarding the 719's battery power option. If I use the optional LR44 battery to power it, do I still plug it into the Mic-In port? Or do I switch to line-in? Or am I supposed to not use the battery at all, since the MZ-R900 has plug-in power? Thanks for any help and advice. JoeBob