This is the 13013th most frequent Spanish word.
pila
Battery; sink; or pile.
In this sentence, 'pila' refers to a small device used to store electrical energy, commonly known as a battery.
Necesito una pila para mi control remoto.
I need a battery for my remote control.
Here, 'pila' is used metaphorically to describe a heap or accumulation of items, in this case, laundry.
Ella tiene una pila de ropa por lavar.
She has a pile of laundry to wash.
In this usage, 'pila' refers to a container used to hold a supply of water, often for communal or public use.