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When connecting your battery, connect the positive (red) first and the negative (black) second. When removing the battery, disconnect the negative (black) first and the positive (red) second. Been doing this for nearly 30 years. ALWAYS connect the positive post first.
âTry different ways of hooking up the potatoes to each other and the clock. âKeep track of what combinations produce some voltage and what ones donât work. âThink about how a battery works when you try to hook up your potato.