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What headlamps do you guys use that aren't the permanently built in rechargeable battery kind? I got a Nitecore UT27 for camp, which comes with a rechargeable battery, but it's hot swappable for another one or triple aaa batteries. Now I'm thinking about picking up an HM70R 21700 with a powerful beam for walking the trail because it goes with my other 21700 gear.
What do you guys use that doesn't have a permanently built in rechargeable battery?