I plan to put a Nichia Triple on my (video) camera for lighting. I was thinking of wiring the 3 LEDs in series and driving them off 2 18650s in series. That’s 2.8v per LED when fully charged. That keeps the battery weight down and eliminates the driver. Of course, I am wondering if a driver would be worthwhile and fit good. Any suggestions? In other words, what am I going to wish I did?