Move on to the next step for the solution to this problem. For younger batteries, a car that isn’t started for days or weeks can also lose its charge. If it’s at least four years old, then it should probably be replaced. Obvious signs that your battery is too old and worn out include corrosion and cracking. One significant reason why a car battery won’t hold a charge is age. Anything less than a full charge means you need to continue to look for an answer. If the voltmeter reads between 12.65 volts and 12.77 volts, then the battery is fully charged. Attach the red lead to the positive terminal and the black lead to the negative terminal.
You’re now ready to use a voltmeter to gauge how much “juice” your battery has. On the other hand, if the lights are not as bright as normal, then the car battery is the issue. Instead, you likely have a wiring issue or a faulty starter. If they provide full brightness, then the problem isn’t with the car battery. To confirm that the car battery won’t hold a charge, you need to rule out other possible problems first. Here’s how to diagnose and fix the problem so you’re never left stranded. If that happens, your vehicle won’t go anywhere.
On occasion, a car battery won’t hold a charge. The battery also supplies electricity to power all the lights, the audio and navigation systems, computers and various electrical-dependent parts. As important as the engine is to your vehicle, it’s the battery that routes voltage to the starter, which turns over the engine.
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