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.
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.
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.
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.