How long coin battery will last - Or it is unlimited free energy - Science Experiment

In this experiment we will find out how much time a coin battery last. I made a battery and attach a LED with it and I had been continuously worked for 3 days before the vinegar dried out.
The battery produce 2ma, 5v and run for 3 days so battery has near about maximum 700 mah capacity. So the average capacity is 350 mah, as the internal resistance is high you need multiple of battery cell in parallel to get low resistance and then you will able to charge a power Hungary devices like mobile phone.

This is the main battery
Charge Your Phone using COIN - Amazing Life Hack - Science Experiment https://youtu.be/b3aSwT-p__A.

If you use copper coin every cell will produce .7 to .8 volt 2 - 4 ma.
for 5 volt we need at lest 8 cell
So if you want to charge you mobile phone at 500 mp
you need 500*8 = 4000 coin.
I don't have this much coin but if you make this much cell definitely it gonna charge you phone.

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