it uses one cr123a battery. its bright. most of the E1B has a warm tint so its really nice but from a distance u wont notice the warm tint for example outdoor...
small.. and i must say the it has a very nice design. the hot spot maybe not centered but its only marginally not centred. its due the TIR lense actually but it negligible...
also not much sharp edges on the light, so probably the anodizing will stay longer.. im not too sure about this..
those who EDC in the pocket daily.. does the anodizing wear off? for the pocket clip i know it does cause its not coated...
plus the light is well regulated. 1.3 hrs of tactical light....the low is bright, well not bright per se.. but due to the TIR, it focus the light so its ver useable. better than a single 5mm nichia LED light though...
and the best thing.. the pride of owning a surefire..