pila
/ˈpila/ · B1 · noun · f
battery
🔋 pila sounds like pile: a battery was first a pile of metal discs
Volta's first battery in 1800 was a stack of zinc and copper discs, called a pile (pila). So the same word means a battery and a pile or heap. Una pila de libros means a stack of books, and informally una pila de means a lot of.