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An electric battery is a device consisting of one or more electrochemical cells that convert stored chemical energy into electrical energy. Connected a battery's negative to another's positive is a way to increase voltage, useful when a battery outputs low voltage.

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Mains supply to replace 6 AA batteries

These are powered by 6 AA batteries concealed in the hilt. … The question is, what sort of power supply would I required to replace the 6 AA batteries? …
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