That one has some confusing information. In one place it says it’s protected, then in another place it says “Without protection circuit! Not for flashlights!”.
That is odd.
At 26.2mm and 68mm it should fit fine. Being a flat top, you’ll need to either use a magnet or solder blob them.
Chinese website? Url 
It probably doesn’t help much, but I just picked up an L2 host (2pc ring style tube) and a Shockli 5500mah from MtnE. The cell fits and will slide out, but barely. IIRC, the L2 and some of L6 tubes should be about the same size, right? Not sure if that’s the larger or smaller L6 tube though.
I just received the liitokala 26650 (black) 5000mah. I had to put a solder blob on it to make contact and it’s pulling just over 17A at the tail. The efest 4200mah (purple) pulls just over 15A. This thing is bright!
Mtn driver with D4 ramping + 70.2 5000k P2 bin.
Very cool!!
I have pretty much the same parts waiting for the Black L6 SMO but with a lighted E-SW too. Think I am gonna try Yellow or Orange in the SW on the black body.
I take it that you are using the Black Liitokala 26650’s in your L6?
Have been wondering… DO they FIT in L6 OK??
(I ordered a pair on Flash-Sale)
I have one of the recently purchased L6 and several Liitokala black. They fit but snug on the OD. No rattles 
My recent L2 is slightly looser on these, proper fit would better describe them.
Yea the new black liitokala. Perfect fit! It won’t run in series out of the box tho.
Thank you Edness, glad to hear that. I knew they were flat tops,but price for the pair was fantastic !..…so… Solder blob no problem. :+1:
i wouldnt feel safe use the liitokalas as u have to use a blob or magnet to make connection in series, what if it shortcuts or something? since they are unprotected its better using the efest since u dont need any magnet or blob…
and is it even a difference if u get 15A or 17 will the lumens be much higher if any?
Solder blob is safe , magnet is not !
He did not say he was using a magnet. Those have risks if you don’t do it right. Solder blobs are super safe. Who told you they are a problem or unsafe?
Problem of using 2 x 26650 Unprotected in series is that the L6 low voltage protection can’t tell if only one of the cell is undervolted.
No good then for the average Jean-Pierre 
But for the lightalcoolic that knows what he does and recharges the 26650s often , that should be ok …
I am still waiting for my L6 from GB and its 26650 Protected KPs from BG …. sooo long wait ….
Whether you use protected or unprotected, they have the same rules. Always use 2 identical cells, same age and same number of charges on it. Before you recharge them, make sure the voltages are the same. This way you know they are running down evenly.
If you just use 2 quality unprotected , but matched cells (bought together , not used seperately before) , they will still be completely fine .
If you want to be 1000% safe just use 2 protected (& matched) 26650 cells .
These are new batteries and solder blobs are safe! I’m sure some of us get a kick just to get one amp extra from an existing setup…at least I do. I just measured it with my light meter and those 2 amps definitely made a difference!
I use a magnet with a nylon washer around it to prevent it moving, is this the main concern when using magnets? that they will move and make contact somewhere they shouldn’t?
Yes, for instance if you drop the light on its side. The magnet might touch both the battery and the battery tube inner wall. If the inner wall is conductive, some are not, then you will get a short circuit.
The nylon washer around the magnet should prevent any issue, good idea.
Remember, the solder blob only has to allow contact, we’re usually talking about the thickness of the wrap so it doesn’t take much of a solder blob to get that contact. I like doing both cells and alternating how I load them when recharging, sometimes in series one cell will discharge slightly more than the other so alternating them helps keep them in balance.
And yes, 2A is major when you’ve gone to great lengths to get everything possible… if a cell change nets 2A then by all means use it!
I was gonna say, if the long protected cell wont’ fit take the protection circuit off.
i look almost everyday on nkon for the Keeppower to get in stock, still nothing 
is there really a shortage on those cells or? it feels hopeless to find good cells in EU bah…