Some batteries last longer than others. This one has been running since at least 1840, possibly fifteen years earlier.
More on the Oxford Electric Bell or Clarendon Dry Pile – one of the longest running science experiments in the world.
More on the battery:
Zamboni/Duluc Dry Pile
Interestingly, the Clarendon/Oxford Bell is a permutation of a Lightning Bell invented in 1742 and used by Ben Franklin in 1752.