Bad Alternator vs. Bad Battery: What's the Difference?
Is your car having trouble starting? Learn how to tell if you have a bad battery or alternator issue with simple troubleshooting tips from Firestone Auto Care.
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In store installation required and costs extra. Participating authorized retailers only. Most vehicles. No cash value. Void where prohibited. Not valid on prior purchase or rain checks. Shop supply fee of 8-10% of labor cost (up to $40) added to invoices over $35, includes cost and profit, and is not charged if prohibited. Other restrictions, fees, and taxes may apply. See store for details. © 2026 Bridgestone Retail Operations, LLC. All rights reserved.
Is your car having trouble starting? Learn how to tell if you have a bad battery or alternator issue with simple troubleshooting tips from Firestone Auto Care.
Will a car battery charge at idle, or do you have to drive to charge one? Learn when alternators do the trick and when it’s time to use a battery charger.
A car battery can die mid-drive—and it’s not always the battery. Explore four common causes of this issue, warning signs, and how to prevent repeat problems.