One of the first indicators that the battery for your hybrid car needs replacement is when your car goes back to fuel consumption. So if you need to stop for gas too frequently, it means that your battery is close to its end.
If your battery’s charging status is constantly fluctuating, this may be another sign that you need a new hybrid battery. This may also include your battery displaying erratic charging messages, such as being fully charged in one minute and very low energy levels in the next minute, and so on.
At the same time, defective batteries cannot hold a charge, so if you charge it throughout the day, it may discharge overnight, with no obvious reason.
Strange noises at the engine’s level may be also signals that your battery has gone too old to be used. In general, a hybrid battery is designed to last for up to 10 years, depending on the car’s model, on the frequency of car use, and many other factors that could have an impact on the duration of the battery. Some car companies offer a guaranteed battery for hybrid cars for the entire lifespan of the car, which can be very good news for many car owners.