Wind turbine V3

EDIT: V4 available NOW ! ;)

I've build this turbine with the objective to produce electricity to charge small devices like smartphone or powering a led strip.
I can't use solar panel because my balcony is lit by the sun 4 hours per day. But luckily for me, i live near the sea and there is constant wind day and night which coming with the tide, so i decided that building a wind turbine can be a good alternative.

https://www.youtube.com/watch?v=v8p_QvocnHA

Until now it's a good base where to start. Any advice is good to take.

This wind turbine starts with wind speed of 3m/s (approx .10km/h) with no load.
The measured torque on the shaft is approximately 0.25N.m at 20km/h wind. I think is sufficient to move a DC motor to produce some electricity but it will increase the wind speed at which the turbine starts.

I'am still working to store produced electricity in a 12V battery and restore it in a load. Of course this part is the most difficult of the project...

I've use A