This puzzle asks you to find the single category linking five clues: AA, AAA, 9V, Alkaline, and Lithium-ion (rechargeable). The answer is Terms used to describe batteries. The clues look unrelated on the surface but share one precise category. Read all five before guessing — the link should feel natural on every row. With only "AA", many categories could fit. Hold your first guess and watch what clue 2 eliminates. "AA" and "AAA" must share one repeatable link — not a coincidence between two words. By clue 3 ("9V"), "Terms used to describe batteries" should explain all three without bending meanings. "Alkaline" strengthens "Terms used to describe batteries" rather than opening a new theory. The final clue ("Lithium-ion (rechargeable)") confirms "Terms used to describe batteries" — if it still fits naturally, the category is locked. Use the Solution tab above for an interactive clue-by-clue walkthrough, or the Solved board tab for the complete answer at a glance.