Originally Posted By: freeballer
I wouldn't mind cr123a as long as there's a noticeable difference.


Check out the FourSevens Quark Pro line to compare:


1xCR123A (QPL): 205 lumens for one hour max output

1xAA (QPA): 109 lumens for one hour max output

2xCR123A (QP2L): 230 lumens for two hours max output

2xAA (QP2A): 205 lumens for one hour max output


That's a pretty significant difference!

(I have no affiliation with any flashlight manufacturer or vendor other than as a customer)