---
id: faq-0066
title: "What should I know about battery replacement and testing?"
category: faq
subtopic: service-and-maintenance
page_type: faq
source_url: "https://www.castlecdjrnaperville.com"
tags: ["battery", "electrical-system", "preventive-care"]
questions:
  - "How do I know if my battery needs replacing?"
  - "Can you test my car battery?"
  - "Where do I get a new battery installed?"
related: [charging-system, electrical-diagnostics]
dealer: Castle CDJR of Naperville
---

A healthy battery typically lasts 3-5 years. Signs it's weakening include slow cranking, dim headlights, or warning lights. Castle CDJR of Naperville's Service Department can test your battery for free to see if it's still holding charge, and we'll install a quality replacement if needed. We carry OEM and reliable aftermarket batteries, and our technicians ensure proper installation and security. Don't get stranded-if you notice battery issues or it's been several years, give us a call at (630) 864-6683 to schedule a quick test.