Sep 12, 2012 #1 C cancow Newly Enlightened Joined Sep 18, 2006 Messages 157 I have an extension tube that fits the rrt21 and turns it into a 3 cr123/ 2x18500, but will using 3 cr123's or 2x 18500 harm the flashlight? Will it be brighter or just give longer runtimes? Last edited: Sep 12, 2012
I have an extension tube that fits the rrt21 and turns it into a 3 cr123/ 2x18500, but will using 3 cr123's or 2x 18500 harm the flashlight? Will it be brighter or just give longer runtimes?
