Clarendon Bell

Some batteries last longer than others. This one has been running since at least 1840, possibly fifteen years earlier.

Clarendon Bell – running since 1840 on same dry pile batteries.

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

Oxford Electric Bell

Interestingly, the Clarendon/Oxford Bell is a permutation of a Lightning Bell invented in 1742 and used by Ben Franklin in 1752.