I AM ISSUED THAT LIGHT FOR WORK, (LAW ENFORCEMENT) BUT I DON'T USE IT MUCH. IT SEEMS THAT EVEN THOUGH IT IS RECHARGABLE IT GOES THRU BATTERIES TOO QUICKLY. I PERSONALLY LIKE THE SUREFIRE LINE....THEY DO TAKE LITHIUM BATTERIES, BUT FOR POWER/ BRIGHTNESS, WEIGHT AND DEPENDABILITY NO OTHER COMPARES....HOPE THIS HELPS...