Q: How do you remove and replace a Nissan Armada battery?A: Disconnect the cable from the negative battery terminal first, then disconnect the cable from the positive battery terminal. Remove the battery cover, if equipped. Remove the battery hold-down clamp boll and clamp. Lift out the battery, being careful as it's heavy. Battery straps and handlers are available at most auto parts stores for reasonable prices and they make it easier to remove and carry the battery. If you are replacing the battery, make sure you get one that's identical, with the same dimensions, amperage rating, cold cranking rating, etc. Installation is the reverse of removal. Be sure to connect the positive cable first and the negative cable last.