Phew!
thanks Bilakos 
It also needs to be 20mm.
The emitter is the same regardless, it’s the board that it’s mounted on where 6V or 12V get’s determined.
And yes, in stock form the original XHP-70 is on a 6V 20mm MCPCB. Mine are all now 26mm MaxTOCH.
I forgot, but will my L6 work with two NCR18650B protected cells? I am looking at these ones. They are 65.5mm flat tops. https://www.amazon.ca/gp/product/B010LTDFBK/ref=pe_1243740_268305490_em_1p_2_ti
Aliexpress sells them but more expensive and ships them to countries that others will not ship too. Many websites that sell keeppower will say out of stock if the country you select is on the list not to ship to such as Canada. Banggood won't ship to canada anymore and says out of stock, but if you choose usa, they are in stock and ready to ship.
They might work but you would need a spacer. The L6 is designed for 26650 batteries
Thanks. I have one of those round spacers that have the springs on either side for contact so that may just work.
Length is not the issue, diameter is.
as you can see in this pic the 26650 on the left 18650 on the right
same length different diameter
Ah, I see. I found some spacers then that would work from an old flash light, thanks.
You can use 18650s as long as you have the spacer, but the NCR18650B is not a great choice for this light because of the cell’s high internal resistance. They will work, but the light output will drop more quickly than with higher performance cells.
Yeah, wasn't sure about that. Hard to get Keeppower 26650's sent to canada with the new laws that was why I was asking.
Gnope. If you’re gonna use 2, you’ll need button-tops. You “can” use small Nd magnets to bridge them, but drop the light and they theoretically can shift and short the positive to the (negative) tube.
Plus, they’re great for up to 3A or so, which is fine for smaller lights, but will limit current to the L6.
Should work fine in lower modes, but…
Or you can try a solder blob to act as a bump, but be careful.
Thanks, I think I may as well just get some good 26650's then.
Yeah, best bet, albeit not the cheapest.
You can still use 18650s, even without sleeves, but they’ll have a tendency to rattle around when the light’s shaken. Otherwise, a thin sleeve (even cardboard from a cereal box 
) can be wrapped around the cells a coupla times to keep them centered and somewhat cushioned.
Simon usually includes a clear flower looking rubbery ring, 2 of them (or 4) that are for putting around an 18650 so they won’t rattle in the 26650 tube. They’re usually inside the tail cap or in the package the light came in.
Oh yeah, forgot about them. Got ’em with my L2s, so makes sense that they’d be included with the L6, too.
I don’t think those spacers come with the L6. Maybe the L2 or smaller lights only.
’K, so we’re back to cereal-box cardboard…
+1
I did not receive them with my L6