Geez that's really nice....I will have to compare the specs on my studiomax IIIs and you guys' toys...Of course I never had portable power to play with my monolights so I am getting all excited.
Yes, it is really handy when you have portable power to play with. Using a strobe that is designed as a battery powered unit and having HS is a joy to work with on location. Using a AC powered strobe that can also work on battery is also an idea although I find this pretty heavy to carry around (using Bowens Gemini) and that's why I am switching to a strobe that was designed to be used with a battery.
My experience. YMMV...
I prefer the Paul C Buff VLX batteries for my AC strobes. I can shoot for hours and not concern myself with how many pops I can get. With Elinchrom HS Trigger, no need for me to go out and buy even more strobe gear. The new HS trigger finally modernizes Elinchrom triggers. I've always seriously HATED the old fiddly triggers. Now I have control of the strobes from the trigger itself, the integrated Sekonic meter, and iPhone (via wifi network I can set up for a shoot).
The Buff VLX batteries are not heavy. If I cannot carry my gear, heck... go to the gym and lift free weights and do cardio. It helps your stamina on hours long shoots and you actually have less camera shake. I just hang the VLX on a stand for extra weight. Ive driven three AC strobes per VLX.
Weight is never a concern. If it is a concern, I'll take up knitting or quilting.