why not? If you are looking for a minimalist strobe, County Com has one the size of a watch. I'm thinking of getting one in a few weeks.

As for battery life, they say 120 hours (5 days continous) for the flashing mode. And since it uses two large coin batteries, a spare set is about the size of two half dollars on top of eachother. Can't go wrong with those specs, even if the side-view range is under a mile.