The car battery's main job is to start all the electrical functions of the car through a large jolt of electricity. It creates this power by transforming chemical energy into electrical energy which it then regulates over a period of time, to keep the engine functioning properly. This is a small part that does a lot of heavy lifting so proper maintenance is key. If you are properly caring for your vehicle and you are purchasing a mid to high quality car battery, the battery should last around three to five years, before it needs to be replaced. Unfortunately, many people find that their car battery only lasts one to two years. This can be a sign that the battery is made from poor quality materials, but it can also be a symptom of poor battery maintenance. If you follow the steps listed below in the preventative maintenance section your battery can perform at its peak for years!