![Britains Largest battery is actually a lake](https://hight3ch.com/wp-content/uploads/2018/11/britains-largest-battery-is-actu-800x440.jpg)
Dinorwig Power Station, otherwise known as Electric Mountain, is a pumped-storage hydro station in Llanberis, Wales. And yes: it’s Britain’s largest battery. Here’s how it works, and why some of the things you think you know about TV pickups might not be so true any more.