What device even uses this??

    • @[email protected]
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      457 months ago

      I took apart a lot of batteries as a kid. The nine volts never had batteries like this inside them.

      • @[email protected]
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        7 months ago

        Since seeing this picture I have disassembled about 50 nine volts looking for this and have found about 3. Some full of coin cells too.

        Edit: I should say it was years ago I first saw this picture. I haven’t disassembled 50 batteries in the last 2 minutes

        • @edgemaster72
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          467 months ago

          I haven’t disassembled 50 batteries in the last 2 minutes

          I reject your edit and substitute the original assumption

        • 🇰 🌀 🇱 🇦 🇳 🇦 🇰 ℹ️
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          7 months ago

          I should say it was years ago I first saw this picture. I haven’t disassembled 50 batteries in the last 2 minutes

          How many batteries can you disassemble in 2 minutes? I’m starting the timer… NOW! Go!

      • @Paragone
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        127 months ago

        The carbon-zinc ones never do, but the alkaline ones do, the ones I opened, anyways ( a few decades ago )

      • @[email protected]
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        177 months ago

        Because it’s a 9 volt battery.

        Batteries are cylindrical because it’s the most efficient shape to make them in. There is a central electrode with the electrolyte around it. By making it cylindrical it’s distributed evenly. Imagine having it square, then in the corners the layers would be thicker than on the sides.

        So that explains why the cells and normal AA batteries are cylinders. So why not have a 9 volt cylinder? That’s because the chemistry used for alkaline batteries produces 1.5 volts. A single cell, regardless of size, only produces 1.5V. So how do you get 9V out of a 1.5V battery? By putting 6 of them in series. 6 x 1.5V = 9V.