I bought a Night-Ops Gladius 2.5+ years ago and gave it to my son, along with 4 RCR123A 3.0 v protected regulated cells and a charger from e-lectronics.net, for use as his always-on-the-duty-belt light. My son works a LOT of 0dark:30 shifts and call-outs, and this set-up STILL impresses our partners - mind you, many of them are either using Mag 3 D or Polystinger!