Do you say this because zebralights usually have very green tint on their leds? 
Usually they have a bad tint yes. They have shown over the years they don’t care about it. Some of their high-cri model were obnoxiously green. Some of their high-cri models appeared to have 80 CRI. I’ve lost my faith in Zebralight when the Mk IV generation came out.
Thank you for the detail. I always thought and read that zebralights are very highly rated. I think because they have good construction quality and good driver. It is surprising to me that they are not as concerned with the tints in the flashlights but maybe most people who are normal flashlight users and not ‘flashaholics’ like us do not concern too much over tints. It seems like a simple thing they can do to improve in my opinion.
What's up with them anyway? All their flashlights are "Back Order" and about half their headlamps are also "Back Order".
www.zebralight.com/Flashlight_c_8.html
probably a combination of global supply chain issues and new cree emitter generation displacing existing one
Has anyone tried it with protected 18650 cells? The length of the cells should fit (69-72 mm), but will the pins in the head and back fit?
It is not clear how wide the pins are, I mean the radius of the circle on which they are spaced around the center.
There is a suspicion that they will not touch the contacts of 18650. This question is because a friend is going to buy 700fd at a local internet store, but he is reluctant to spend money on 21700, he has a lot of protected 18650. Side rattle is not a problem, the cell can be wrapped with several banknotes
There is no spring in the SC700, only very short travel pogo pins, if the protected cell is a bit short like 68mm it probably won’t make contact.
The light will draw up to 7.9A so the protected cell would have to be able to provide that.
Anyway the pogo pin circle on the + side is Ø7mm, in the tailcap it’s ~12mm
Thanks a lot! 
I gave him the information, he will measure his cells