How Long Do Prius Batteries Last- How Do I Know Read Or Miss Out The lifespan of a Prius battery depends on several factors, including how it is used and maintained. Generally speaking, the battery in a Prius can last anywhere from five to ten years. However, if the car is driven regularly and maintained properly, it could last even longer. To determine if your Prius battery is still in good condition, you should have it tested periodically by a qualified...