Just saw this
https://waterlilyturbine.com/store/
It's interesting, and can be used with moving water or wind. I've seen backpacking wind turbines, but are awkward to carry and fragile and need wind. Running water is sometimes more dependable. Weight it too high at close to 3 lbs for most backpacking situations, but could be useful in some situations.
It would be nice to set it up in the stream at night to recharge and have it fully charged by morning, or even top off at lunch by a stream, and water should have that power.
Perhaps future versions of this will shave the weight down.