334 batteries are all of a similar size. Give or take a few millimetres, each 334 battery is approximately 305mm in length, 175mm in width, and 222 millimetres in height. Despite the fact that all of these car batteries are designed to fit bays of a certain size, they are by no means the same. Lead-acid batteries are standard products used in many new cars. These batteries will start your car for up to 20,000 starts before they must be replaced. What's more, they also come with three-year guarantees. Calcium batteries are middle-grade products that will last up to 30,000 starts and come with 4-year guarantees. They will handle the needs of many modern cars. Absorbent glass mat (AGM) batteries are premium products that will last for up to 50,000 starts. These high-end batteries come with 5-year guarantees. If you have a modern car and use a lot of electrical equipment, an AGM 334 battery may be for you.