How To Make a 3 Penny Battery

كيف تصنع بطارية من قطع النقود المعدنية

 

Is there energy hidden inside your pocket change? Convert pennies into make-shift batteries that can drive small current devices like LED’s and calculators.
Many people have asked how long the green LED stayed on. Surprisingly, it was bright for 2-1/2 weeks before finally fizzling out!