I could get a hundred feet of #00 welding wire and build a coil around my pack since I use series wound DC. Not difficult to determine polarity to current flow, RIGHT HAND RULE. Really doubt it would make any practicable difference even measuring 3places aft the decimal on my volt/current meters.
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casual notes from the underground:There are some "experts" out there that in reality don't have a clue as to what they are doing.
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