Pretty much all cells 67mm and up will work in the TC20. I would stay with a quality High Drain cell though. Actually some of the shorter cells “work” so to speak , but a good jolt causes a flicker or mode change with the shorter cells.
I would use shockli imr 26650 when I get my tc20. I feel like light company pushing the limit ( 3800 lumen), so imr would make perfect and substain turbo mode little better.
Example…
Acebeam L16. Need imr for the turbo mode.
I’ve tried 3 different brands of batteries and they all fit. Power draw are also identical…regulated output. I’m sticking with the battery that came with the light.
I agree with you on the one that came with the light as I tested Efest purple , EVVA , King Kong , Basen , AWT and a Voidhawk protected cell and all were pretty much identical as you say , on draw and output.
Received a NW yesterday, awesome flashlight! It’s a little hand grenade!
I’m happy with the tint, the snow all melted here so I took it out on a walk and the tint is perfect for me, beautiful neutral color rendering. I don’t notice any of the tri-color rainbow that’s visible indoors on white walls, but it’s not going to be used indoors anyhow, and don’t think I’d want the tint any colder.
The switch feels fine to me, I see how its been described as “mushy” it has some extra spring travel before it clicks, but I guess I’d call it a bit “springy”? But hey all switches aren’t created equal, maybe it could be more precise but it doesn’t bother me at all. It might even help for prevention of accidental turn on, seems like you can depress it very lightly without it turning on. Although you can just do a mechanical lockout by a slight twist of the head. (unscrewing)
I really love the aggressive knurling, it rivals the knurling on my HD2010 and DQG 18650 tiny V1, which have best knurling of all my lights. I also love the “single click-on/off” (Olight) UI. Overall I’m very happy with it, @3800lm it’s the brightest rated light I own now, tomorrow night I’ll take it out again with some other lights and compare brightness.
Ow God, please, stop…. Did I told I’m trying to resist? :cry:
MUST RESIST!
is there any way to lock out the button?… prevent accidental turn-on?
thanks
Yes, mechanical lockout by a slight twist of the head. (unscrewing)
I also added that info to my previous post about the switch.
Sorry!!! 
Oops I missed that… cool then thanks!!
Does Thrunite charge up front for pre orders of this light???
TC20 battery came fully charged, slightly disconcerting. 4.19 according to lil500. Never had a brand new battery come from factory fully charged. Paranoia big destroyer!
Has anyone tried unprotected flat top high drain batteries in this light? I want to have spare cells for this light.
I tried Keeppower IMR 4200 and worked fine.
Great thanks!
I will also be running a shockli 26650 imr flat top… a light like that should deserve imr in my book.
Works fine with an Efest IMR 26650 4200mah 40amp battery (purple)
LiitoKala Lii-50A 5000mAh unprotected Flat Top IMR also works fine.
What batteries do you have?
I have some 18A IMR efest 5000 mah on the way.
Every once in a while the switch doesn’t respond. It’s only happened a few times. Has anyone of you experienced this?