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rhino369 t1_jef3hbp wrote

Reply to comment by wedontlikespaces in eli5: Why do seemingly all battery powered electronics need at least 2 batteries? by OneGuyJeff

Different electronic componets operate at different voltages. If you use only 1.5v components you can build a mouse that only needs one.

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TheSkiGeek t1_jefdalm wrote

Or you could step up the voltage to 3V (or 5V or whatever you need) internally. But these days you can probably get stuff like Bluetooth/wifi chipsets that can run on very low voltage for exactly this kind of usage.

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