How do I read a car battery gauge?

I’m worried about the health of my car battery, seeing as it’s getting pretty old. How do I read a car battery gauge so I know if it’s dying?

Good question! Understanding the numbers on the battery gauge of your vehicle can help you estimate how much charge you have and whether you’ll need a jumpstart
Most passenger vehicles use a 12-volt battery system. When your battery has a full charge, it should be around 12.5 volts on your voltmeter, which is the battery gauge in your vehicle. Once you turn on the engine, your voltmeter should show around 14-14.5 volts.
If your battery has a charge below 12.5 volts when the engine is running, there may be a problem with your alternator or charging system that will require maintenance.
If you’re concerned about your car breaking down or needing a jumpstart, try a roadside assistance membership with Jerry. Jerry’s roadside assistance membership protects you with its nationwide network of 55,000+ service providers.
Good luck!
Matthew Macgugan
Answered on Nov 16, 2021

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