I have AW IMR 1600 mah, Samsung 25R and Panasonic NCR18650B 3400mah batteries in my arsenal. I use the Panasonic's in my Innokin VTR and the other 2 in my Reo. The Panasonic is a "protected" battery that I want to use in my flashlight as well and is thee battery of choice with the flashlight...