Truthfully, I don’t know anything about batteries or how they’re made. All I’ve ever needed to know is they make things work. However, NYT Crossword puzzle clue “One end of a battery” proves there’s more to batteries than just popping them out of the box.

This clue is from the NYT’s Aug. 7 mini crossword puzzle. While it may be easy to solve for those who know a thing or two about batteries, for those of us who don’t it’s almost impossible—which is why I’ve included four hints to help you.