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Smart meter backup

Hi this just a point of curiosity  but I was just wondering if smart meter backup batterys  are rechargeable I suppose the fact that we mite possibly be in for a winter of powercuts  peaked my interest

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  • Let's start with an ordinary meter. They must draw some power, albeit a tiny amount, to power the LED display. What happens when the power goes off? Is there a battery, even a small one like those which used to be (still are?) in PCs; or is the reading stored in non-volatile memory (similar to a USB "stick")?

    If the power is off, does a smart meter need to do anything more? If there is no leccy, there is nothing to meter!

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  • Let's start with an ordinary meter. They must draw some power, albeit a tiny amount, to power the LED display. What happens when the power goes off? Is there a battery, even a small one like those which used to be (still are?) in PCs; or is the reading stored in non-volatile memory (similar to a USB "stick")?

    If the power is off, does a smart meter need to do anything more? If there is no leccy, there is nothing to meter!

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