While we tend to prefer rechargeable lights, there is a benefit to AAA headlamps: instant refueling. Just carry a few extra batteries, and you can return to 100% power in a minute or less.

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If that sounds like you, opt for a light that runs off AA or AAA batteries, and stock up. Some headlamps (see the Silva Trail Runner Free H and Black Diamond Sprinter 500 below) work with either ...