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I also have an old Black Diamond headlamp, also AA powrered, that is uneatable so far. It has three LEDs for long, and close range applications, a wide variety of modes (including blinking for emergencies).
But what I really like is a silicone cone from Klarus, that converts both the ZL and Nitecore into a lantern/chandelier/marker for walking along a road or for lighting up an entire room/bunker at night. No shil for the product, I just really like it, and it took some research to find this awesome product -- lots of people make their own diffusers, but this thing can stay attached to your light while in the backpack and be compressed by other stuff and not break and function whenever you take it out.