Reviewed by Shannon Martin, Licensed Insurance Agent.
Good question! A dead battery might not kill an alternator but can have negative impacts.
If you try to charge a dead battery using an alternator, it will cause excessive wear and tear to your alternator. Theymaintain or partially recharge car batteries, not resurrect dead batteries.
Overall, a weak battery loses its charge faster and is less successful at holding a charge. This puts an additional strain on your alternator, reducing its lifespan.
However, just because your battery has died does not mean your alternator will die too.
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