If I'm interpreting your question correctly, yes, you charge the 18650 battery with a USB cable that plugs into a clever port on the light (you unscrew the end opposite from the battery compartment a few turns, and that reveals the charge port - sealing system). You can do battery swaps in the field (trail), but with the stock charging capability, all batteries would need to be charged through the light itself. I happen to have a separate charger for 18650 batts, so that's going to be handy for me. Separate chargers and batts can be found here for very good prices:
A Bit More Testing:
I did a non-riding back yard test last night against the Chinese dual LED light that I usually use on my helmet (claimed "2000" lumens, uses a brick pack made up of 4 x 18650 batteries). I would say it sheds a similar amount of light, or slightly more than the china light, however the beam of the Raven Double is broader. So the middle spot of the china light is a bit brighter, but the spread of the Raven is VERY wide. If this thing can get the run time they claim, it will vastly out perform the China helmet light, as that one only lasts about an hour on full bright (even with so many batts in the pack). I think the intensity of the Raven will be good enough for riding around here (North Van - lots of slippery tech you want illuminated), but my preferences for a helmet light might would be slightly less spread and a bit more spot intensity. I normally use a 4 x LED china light on the bar, which has a ridiculously huge spread, so a "spottier" beam on the helmet is a bit more complementary. We'll see, I look forward to testing it out while riding. No matter what, I won't need to deal with a wire running from my pack to my helmet, so that's a big win in itself. It's also going to be a great light for other applications too (Skate skiing at Holyburn, camping, etc), and given the huge spread, would probably make a great bar light for riding or single/only light for mellower riding.
One neat feature I didn't realize it had, was a fully adjustable low beam. The high beam is always set at highest intensity, but you can set the low beam anywhere between almost no light, to the same as high beam. If you keep the button pressed, it enters a low-beam adjust mode, where it gradually goes from super low to high (over around 15 sec). In that mode, when you press it a second time, it locks in the low beam at your chosen intensity. Super cool, as I use the low intensity about as much as high, and some times low is just too low (or other applications may require very low setting).