Working Prototype Free Electricity Generator Battery powered LED

[notifylife]

I made a design with an Ice Tray, Copper wire wrapped around bolts.  This experiment produced 3.89 volts between the 16 cells of tap water.  It powered one 2 watt LED for over 48 hours.   I understand that the voltage has dropped after time and I made a small liquid battery.    How would this work scaled up?  Has anyone tried?   Is the Statue of Liberty producing power in the same way as this demonstration?   It may be it seems, and also other iron obelisks are also producing energy.  Where does the energy come from?  Is it considered free energy?

Video Demonstration:  https://www.youtube.com/watch?v=C-lQQJDxvLo 

[SeaMonkey]

You've created a Voltaic Battery consisting of a number of
Voltaic Cells which are series connected.  The tap water
contains enough dissolved salts to function as a weak
electrolyte.  The dissimilar metals copper and iron make
up the plates of the cells.

When your battery of cells is attached to a load such as
the LED the chemical action of the electrolyte upon the
iron produces enough current flow to activate your LED
thus producing visible light as an output.

If you were to add a little table salt to each of the cells you
would see an increase in chemical activity in that the
brilliance of the LED light output would increase.

Using zinc or aluminum instead of iron as one of the
plates in the cells would also increase the electrical
output.

While not free energy, it can be very inexpensive energy
if the materials used are essentially free.  The battery would
have to be very large with large metallic plates in order to
produce enough energy to do anything useful.  But, what
you've done is a start.  Continue with your experiemts and
learn what chemical action is taking place in your cells.
ElectroChemistry is a fascinating field.