Kurt Albershardt writes:
The iRiver iHP-120 and iHP-140 have, well, sort of mic inputs.
About like a MiniDisc.

Oh cool, I heard of those but forgot. I'll check them out. I'll
guess that a Minidisc's mic inputs are about like my camcorder's,
which is good enough for my purposes. Do they have any big
shortcomings?

The NJB3 wants 5V DC and will fry somewhere around 6.5V IIRC. I
know people have cooked them with 6V SLA batteries.

Put a regulator on the battery pack--using a 6V pack you could use a
3-terminal linear job at some cost in wasted power. Use a switcher
like a TI PT78HT205 with a 9-28V pack and you're home free.

Thanks, this is very helpful too. I'm thinking in terms of a four
cell NiMH pack (9000 mAH D cells). Think that will provide enough
voltage? It might drop to 4.5 volts or something as the batteries
wear down. Do linear regulators still need to drop a minimum of 2
volts or so? Also, do you know how much power the NJB3 needs when
recording in PCM format?