1) The bell draws 1nA of current from the 2kV battery. Power consumption is 2μW<br><br>2) It's been running for 176 years so about 1542816 hours.<br><br>3) We know that the battery contains at least 1542816*0.000002=3.085632Wh of energy. Pretty comparable to our modern day AA alkaline battery of 2000mAh.,(reply>), Definitely not. It’s 176 years old you melt.,(reply>), Bit a modern day batt has no shelf life in comparison to this ones run time,(reply>), The amount of current drawn varies according to many factors including actual wear to the components.<br>Plus the batteries have never actually been measured with any modern electronic equipment,(reply>), Kevin Martin by this logic, it could run well past the integrity of the components of the bells. I see it is encased as to slow elemental degradation, how long to do you think it could run for?,(reply>), That also represents only about 5.6 coulombs of charge. Per Faraday's constant, this represents 58 micromoles of electrons, and would correspond to the redox of a minuscule fraction of the metal present in the electrodes and/or the ions in the electrolyte.