Why do most electronics that run on two batteries require you to have them facing alternating directions?
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There are 2 ways to wire batteries into a circuit: in series, or in parallel. When 2 batteries are wired in series, they create more voltage (the force of electricity), but with the same capacity. Connecting the batteries in parallel doubles the capacity, and keeps the voltage the same.
Batteries in series would have one of the batteries connected to the working components at the positive end, and another connected at the negative end. Other batteries could be connected directly terminal to terminal, or by a metal plate, which could be placed in the end of the device, away from all the buttons and other functional parts of the system.
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