Neewer Vision Four with Radio Trigger. $279.
In the distant past I owned two different flash systems that were designed from the ground up to be used on location and powered by batteries. Both were pack and head systems and both were cumbersome but very useful. I owned the Profoto B600 power pack and head as well as the Elinchrom Rangers RX AS power pack and two heads. Both were older tech. They used sealed lead acid batteries for power and as you can imagine they were both heavy. The Profoto was 600 watt seconds and a nice little system but the batteries only provided between 80 and 120 full power flashes, depending on the ambient temperatures. I had to carry a bunch of heavy and expensive batteries with me to get through a day of shooting. Recharging the batteries took five hours and each replacement battery was about $250 plus shipping. The current Profoto system, with newer battery tech, is well over $2,000.
The second light was my super heavy duty system from Elinchrom. The Ranger RX AS pack and head could belt out 1100 watt seconds at full power and a single (very heavy) battery could pump out about 250 full power flashes before it needed recharged or swapped out for the second ten pound ballast I hauled around as a back up. The pack with battery weighed in at 18+ pounds and, yes, I've carried the system over rough terrain for miles, at times. Not a pleasant way to roll.
As styles changed and the jobs that required massive amounts of battery fueled flash power declined I sold both of the units and was happy to