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Any reason why I shouldn't get pic related as my one and done headlamp?
I had a smaller/lighter one for a while and while the light output was generally sufficient for my needs, I did run out of battery a handful of times during exercises. For my needs I don't care about weight/size, but lengthy battery life for the middle brightness and most importantly, the ability to hot swap out the batteries if I ever needed to with extras I'd keep in my car or whatever, rather than be beholden to similar headlamps that have sealed battery units so the whole thing is effectively useless if the battery runs out