human
How can I tell when it's time to replace my car's battery?
assistant
You should check your owner’s manual for the recommended mileage before replacing your car's battery. If you have a newer vehicle, you may need to change the battery every 3-5 years or 100,000 miles, whichever comes first. If you have an older model, you may need to replace the battery more frequently depending on how often you drive and other factors.