Most manufacturers offer a 10 year warranty on batteries, limiting the chances that you will pay out of pocket if you need to replace one. However, know that in some cases, battery life can degrade over time. Just like with your smartphone, the battery loses its ability to maintain a charge. This means it needs recharging more frequently than before. As a result, you might be limited to shorter trips on the hybrid battery power. Also, if you are buying a used hybrid or electric vehicle, be sure to ask about the battery. Many times the warranty is not transferrable, so if it fails, you would be responsible for the cost to replace it.