Any suggestions for a portable power pack. I would like something to power my Sony 9" NTSC monitor while shooting in the field or possibly a light or two.
You can make your own "juice box" with a good battery pack (NiMH, li-ion, or li-poly) and an inverter. For ultra good power, get a PURE SINE inverter; they cost more, but are needed for sensitive electronics that won't run properly with a MODIFIED SINE inverter.
We made such a box, and it works like a charm. Output is 300W max, and it has about 310Wh. With some efficiency lost through the inverter, it still provides a decent amount of power. Great to recharge various equipment, and to run some CFL bulbs for lighting!