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I would buy a headlamp, it’s so much more convenient to have your hands free and the light always pointing where you look. I would go for two/four AA bateries. My current headlamp uses three AAA’s. The odd number is not practical when buying or charging and if it used regular AA’s instead, I could exchange the batteries with my GPS or my backup phone. The ...

If you just want to solve the problem, go buy a LED headlamp. There are now quite a variety available on the market. A bunch of years ago this wasn't the case, and I built my own. It drives 4 white LEDs from two AA batteries. I calculate about 20 hours run time from two fresh batteries, although I have not actually logged hours to verify that. 20 hours ...

I recently got this. 41bgn. Takes 4 AA batteries (I do not like the tiny AAA-s; also 4, not two). Is VERY bright with fresh batteries. Not too heavy. Also, they claim it is for divers -> good in the rain. I use Eneloop batteries, guaranteed to have very low self discharge (I have been having them for two years and hold many hours of lightning). Hand strap is ...