A lot of guys listed 2 headlights. I've never had one fail and fresh batteries will last me weeks.
I had mine fail years ago on Kodiak with a bag full of bloody deer meat, just as night fell and we were still a mile from camp.
Talk about pucker factor!
Luckily, the guy I was hunting with was an Airborne Ranger and quickly provided me one (of his two) backups.
That was the first time I'd heard the adage "one is none, two is one...."
Since that day, I carry duplicates of most of the small essentials.
