Change your red dot batteries

[3seasons]

FF3 will start to blink for a couple hours before it shuts down.  I know this from experience too.  I always put new batteries in at the beginning of season, but this year I was working and didn't take the 30seconds it takes to change it out. Needles to say after it started blinking I took the time to change it.  I keep a spare in my vest for my FF3 and my daughters red dot.   

[outdoorsmen]

Just call it hunt and release.  I'm still using the original batteries that came with my aimpoint 7 years ago. Aimpoint has long battery life but I only turn it on when I think I'll need it.

[bbcoach]

The batteries for the red dot draw very little current and if you turn them off after your hunt would probably last many years.  I change mine before every season just to be safe though.  It sucks when it does happen but if it does just center the head in the scope and squeeze off a shot.