I ordered five lights and assumed that they all would work and did not check on the last two for a couple of months. Yes I charged the lithium battery and used three triple A's as well to no avail. There is a thirty day warranty that I missed and now have $60 worth of trash.
This light is no better or brighter than less expensive "TAC" lights. Please research all potential purchases and save money. Don't believe the advertising hype.