The Worlds most Durable Battery

The Oxford Electric Bell is formed of a small hanging metal ball, swinging back and forth between two bells. It's been working constantly since 1840 and oscillates so quickly that it has rung over 10 billion times. What makes this so impressive though is that it is still using the same battery as it did when it began almost 180 years ago, making it the world record holder for the world's most durable battery.