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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.
Follow these tips to keep your batteryâand your handsâin tip-top shape. Author Copy Created with Sketch. Q: A friend of mine told me that I should always disconnect the positive terminal of the battery first to keep the electricity from spilling out of the battery. I can't see how this would matter. I just unhook whichever terminal is closest first. I've never noticed any spilled electricity, and I think he's just pulling my leg. A: Let me relate something that happened to a friend of mine, a dentist by trade who likes to work on his sports car occasionally.