Kinetic Battery Banks and Chargers

I did a search and saw others inquiring about the K-Tor hand crank generator. Has anyone used this?

What about utilizing some kind of technology with a similar principal. Something more like AMPY?

I like the idea, but it's more for a handheld GPS unit, not for a pphone. I'm also looking for a GPS with a charging cord which would match some sort of charging unit like this. Something that

Thoughts? Personal experiences?

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Kinetic Battery Banks and Chargers