Ok thanks for all the input on the ext in. It will probably be fine but I can see how it would bother someone that the levels are left to human error.
Ran the unit last night for about 6 hours with a Fremo Q-02 3200mAh battery, then charged my iPhone after. 3/4 had the internals running and I think I had 1/2 set to mic with nothing going in. I'm guessing that would be about the same draw as line in because phantom power was off(but please correct that if I'm wrong). Not sure how much juice was left but I charged the Fremo overnight, as I'm hoping to try out the DR-70d tonight. I'll still probably end up purchasing a higher mAh batt, but it seems like this will work for a single night. I'll of course have AAs on hand just in case, and will report back on how it goes.
A couple things...
I said earlier in the thread that CA mics could potentially be run with the phantom power. DO NOT DO THIS!! I should have thought before I posted, but those mics cannot be powered above 12V, and the phantom on the 70d is way higher.
What
can be done that I've been needing is 4ch all with mic in. The Naks/Teacs have low output and cannot be run line in that I'm aware of, so it will be nice to try out a stereo pair of cards with center omni now.
Edit to add... Something I don't like. I really don't like how the battery compartment opens. It took me a minute to figure out, kept thinking it was to slide off, but it pops off at that little tiny notch. The DR-2d has a similar compartment for the SD card that I don't like. Doesn't the plastic that holds it on break eventually? Other than that the 70d seems to be pretty sturdy.
Here you have to use two, and the display only shows the current highest peak level from any channel (it doesn't tell you which one).
^ Maybe I'm missing something here, but when testing I seemed to show 4 channels. That said, I didn't actually plug in any miniplug devices to the ext in to see how they would appear on the screen. Are you saying you only have a single bar on the screen for a stereo pair, as if it were mono?