sean …
the ENB chargers may no longer be generally available … also you need to be careful … a year or two ago i posted up a video of a fake ENB 3 cell charger that overcharged a 18650 bat, the voltage kept on increasing till the tester no longer felt safe (it never leveled off) … not the best thing
just get one of the litokaala 100 or nitecore F1 … some of the millers test fine, others have issues accepting protected … the other consideration is to be able to charge RCR123 (16340) since yr zebralight cr123 lamp might be able to use those as well, this requires a charger than can step down to 0.5A for safe charging
which comes back to … you guessed it … litokaala 100 or nitecore F1 ….
as to the bat just buy the zebralight protected 3400 mAh bat … its on sale and its guaranteed to fit yr lamp … if you really wanted to take a chance you could ask around CPF for 3500 mAh bats (the latest) that MAY fit yr light, but then again they might not
for applications like a headlamp theres no real reason NOT to use protected … for certain applications like high powered flashlights (much more powerful than a 1000 lumen headlamp) or vaping a protection circuit can limit the current preventing you from getting the maximum output … but for normal headlamps where the draw off a XML2 emmiter probably wont exceed 3 amps its a totally moot point …
since you are going to be dealing with loose bats all the time in yr pack, and charging them constantly … just get protected bats
remember that fake charger i posted above … all it takes is a defective or damaged charger for an overcharge condition to happen … it takes ~2 hours to charge an 18650 3500 mAh bat, while you SHOULD never leave it alone, the reality is that you might doze off, yr kid/wife/dog might demand yr attention, etc ….
and all it takes is a brain fart for a bit of a smoke show to happen if you short it … again brain farts happen when yr cold tired wet hungry and in the dark …
https://www.youtube.com/watch?v=UAPC3rf-x9g&feature=player_embedded
“I had the battery in this pocket by itself, it exploded through the pocket, charred and melted everything in the bag,” Mcinerney said.
;)