system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do batteries need to be oriented the opposite direction of the batteries they're adjacent to?
gpt
They don't. It all depends on the connection wires in the device that the batteries are being used in. Though most commonly they are of opposite orientations because that allows the smallest distance in wiring to connect the positive to the negative poles of each successive battery.