Few years ago when I started to take photos with off camera lighting (at that time with Nikon speedlights), battery powered studio lights were something that I though I would never purchase or want to haul around.
Hunger grows while eating, and I eventually stepped more into the realms of studio photography. Because I started with speedlights that could be used anywhere without AC, natural choice was to get also some battery powered studio lights. I have been using some time now the AcuteB, 600 Ws battery light which have been performing well in all shoots, even when used outdoors in winter time. For some situations I have been needing even more power or battery that just last and last, pop after pop.
I found this used Pro-7b battery powered generator + heads from local Profoto reseller, and deal was too sweet to miss it. It has previously served kaupoi in active use, so hoping it has absorbed some of his good skills. Light is light, but hard to be not excited about the new lighting toys. Hopefully the table & information below is useful for photographers thinking whether to get or not battery powered studio lights. Of course there are many more alternatives in the market and also external power packs (Vagabond, Tronix etc.) that can be used with "traditional" studio lights.