I got one of those crank-up flashlights as a gift. You don't appreciate how long a minute is until you use one. I would regard it as a true last resort, or maybe one step before breaking out the candles and matches. LED flashlights that run for days on AA batteries can be had for half the price, give much more light, take up less space, and are a lot easier to mount on your handlebars. And you can carry about ten sets of spare batteries and still be taking up less space.