Your car battery powers all of the electrical parts in the vehicle. This is includes the headlights and audio systems. Perhaps most importantly, you simply won't be able to start your car if there is not enough power in the battery as in addition to powering the starter motor, it provides the spark that ignites the fuel which starts your engine. Lead-acid batteries are the standard in most cars and they usually have a lifespan of between 5 and 7 years before they need replacing. For a list of suitable batteries for your car enter your registration and select. We will deliver right to your door - good news as car batteries are pretty heavy!