Consider the Knog Quokka (an Aussie company. obviously),available in the USA only from REI. Rechargeable without a cord(plugs directly into a USB), light (under 2 oz) and very compact. Can be locked.

https://www.rei.com/product/169056/knog-quokka-rechargeable-headlamp

I have a couple and find them useful, although I have not yet used them extensively.
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Geezer in Chief