Electrical power has two main factors, voltage and amperage. A bad analogy is voltage is the speed of the bullet. Amperage is the size.
A stream of tiny bullets, like BBs will hurt like hell but won’t likely kill you. A single slug will ruin your life even traveling slowly.
You can use electronics to mess with the volts and amps by trading one for the other. Lower the amps and increase the volts. So you can take the low voltage of a battery and really juice it up by reducing the number of amps.
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