
I travel alone. i need this thing I've had it for almost three years now and the battery is still fully charged. I can't tell you how well or if it works. You can only use it once. The two simple tests you ran show that it works, so I'm taking it for granted. It's well built, small, waterproof and lightweight, all important qualities for a hiker. If I'm lucky, I'll leave the thing in my backpack until the battery dies in a few years, and then I'll throw it away and buy another. When my luck runs out I will update this review.

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