I measured mine on both ends and got 26.99mm. It’s an earlier version, though.
I remember reading that some of the newer batches of L6 battery tubes were a bit smaller in diameter than normal. I wonder if you have one of those?
I had a clear L6 I modded and sold, and the batteries I still have fit tighter in my new Black L6. Black litto need the tube off and pushed through to get out. Not tight enough to hurt the battery at all, but the air can’t pass to allow them to fall out even with a bump. I can see just the addition of the metal strip up the side of a protected cell making them too tight. My black Keeps are just slightly looser.
Didn;t know the tubes got smaller, I initially just thought it was the difference in the black compared to clear anno thickness at first. But I did notice the difference.
Maybe that is why the L6 has had good coupon deals lately for $45? I just bought another black NW this morning.
It was around April of this year that certain batteries seemed to grow in diameter and the L6 tube got a tiny bit smaller. So people started measuring. Some were tubes were 26.79mm and some were 27.12mm. A lot of variations.
I think about here or the page before is a good starting point if you want to read about it.
Do you imply that KP protected the Shockli cell, hence the 4mm length difference? And by the way are Shockli rebranding cell from a big name or are they doing their own stuff?
I have seen a source, but don’t have it at hand. ICRs are old tech now.
The L6 is at $46 in this coupons & deals thread:
Nah, it’s just the holiday season. There’s tons of sales going on.
It should, unfortunately it seems inactivated by now. That's why I used the "FinGB" one.
wow that 6000mah cell KP looks interesting its gonna cost alot i bet just 1 battery, i hope Nkon will bring that in… they never seem to even have the other 5200mah battery in stock 
i hope my L6 arrives soon im anxious to get this badboy before holidays hopefully unless shipping screws up…
There it is again: L6 for $45 in this thread:
My l6 came today from gearbest after almost 1 month of travel. Its an amazing flashlight it feels so well built for the price its crazy nothing remote what i can think of comes close. I am using the efest 4200mah batteries they work perfect u can see on the pic there is some space left i was worried they wouldnt fit maybe but they do. Happy to own a few lights from convoy and now the l6 in hand 
You will run into problems if you use protected cells that are longer than 70mm. You’re way safe.
I posted this on the mod thread but here’s what I did to my L6 last night.
Driver is from MTN with D4 ramping. Got the led from KD.
Getting just over 15A from the tail with the new setup vs 7A with the old led with resistor mod.
Make sure the reflector is screwed down snugly so you get good heat transfer from the mcpcb to the body. If not the led output could shift to blue very quickly and burn up.
L6 uses screws to hold down the mcpcb
No it doesnt. It has either one or 2 screws to prevent rotation. The reflector is what pushes it down.
I thought all of them had 2 screws like mine … Interesting . Bought mine from BG
Yup that’s right. The screws is just to prevent rotation.
Amazing output with the 70.2! Quite happy with the tint as well.
Hi anybody have a good protected battery sugestion for the L6? Keppower sems to be inpossible to get today.