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How to Tell if Your Car Battery Needs Replacing

Model: (Various brands) Various
Part: Battery

Video tutorial

Let's look at the signs that indicate when your car battery needs replacing. We will also use a tester, an essential tool for many uses, which costs only a few pounds on major e-commerce platforms.

Below 50%, the battery needs replacing or recharging (if it is rechargeable). Additionally, if the vehicle is left unused for an extended period, a chemical reaction occurs that discharges the battery.

You can avoid this issue with a battery maintainer. The optimal charge is around 12.70 volts.

The YouTuber performs a test called 'voltage drop', forcing the starter motor to start the vehicle. The battery voltage drops close to 10.00 volts, making it impossible to start the car. Disconnect the battery terminals and replace it. Check the voltage of the new battery with the tester; even with the voltage drop test, it should not fall below 12.70 volts.


Updated on 29 June 2026 by ScegliAuto


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How to Remove the Rear Seat of a Hyundai Tucson?

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by ScegliAuto

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