• Fredy1422@lemmy.ml
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    5 months ago

    they have, although some do take AA or AAA batteries but its very uncommon. some especially carbon monixide dectectors have internal batteries that require replacement.

    • variants@possumpat.io
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      5 months ago

      We just bought new smoke detectors and they take AA, I bought a 9v just out of assumption and got home and was blown away

        • randombullet@programming.dev
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          5 months ago

          Eh not quite. AA are 1.5v so two would only be 3v.

          You might be thinking of the big 6v lantern batteries. They’re usually 4 x 1.5v cells together.

          • GladiusB@lemmy.world
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            5 months ago

            I thought I watched some YouTube video where they linked them and it worked. But who knows how accurate the numbers were. I guess not since you know.