Sorry, this is probably really simple however.......
I brought a new olight M20 today (awesome) - I see it takes either two CR123A or one 18650 battery. (I've currently got 2 x CR123's in it)
I'm thinking 2 x CR123 @ 6v will give me more light (because of the higher voltage) but not last as long as 1 x 18650, - is this correct?
Also, while I'm asking, the M20 comes with a battery tube thing, I'm guessing this must be for the 18650 as I cant fit the CR123 in there (too fat) - is this what its for? The CR123 rattles around a wee bit in the touch, wondering if I can widen the tube a wee bit (sandpaper perhaps) so they will fit.
Thanks in advance,