If your vehicle is equipped with a protective cover over the battery, be sure it will fit the replacement battery. Never install a battery with a rating lower than what the manufacturer recommends. A higher rated battery will work effectively if it fits properly, but a lower-rated battery will have an adverse affect on the vehicle's electrical system. Purchase from a large volume seller. Getting a fresh battery is important.
Most batteries have a life span of three to five years.
Don't buy a battery that has been on the shelf for months. The life span includes the time the battery sits on the shelf. Date codes can be found either stamped in the top edge of the battery case or on a sticker affixed to the battery. In these cases, J would reflect September, K for October, L for November, and M for December. This code sequence is used by GNB, Interstate, and other popular battery brands.