Corrosion can damage the battery terminals with time. Greenish residue on the terminals suggests corrosion. Clean up the terminals as part of the activity of fixing an auto battery. 2X-3X Additional BATTERY Daily life: Expected service life is 2X in excess of a conventional direct alloy AGM battery, and 3X https://bookmarkzap.com/story17978806/car-battery-change-no-further-a-mystery