Why Is My Car Battery Not Holding Charge

If your car battery isn‘t retaining its charge, you may be in a precarious situation. Jump-starting the battery may be a solution. However, more complicated issues necessitate further investigation and more extensive repairs.

We understand the importance of your vehicle to you and how crucial it is for it to start and run smoothly. You are likely focused on determining the cause of the issue and how to repair it.

If your car‘s battery isn‘t retaining a charge, you may wonder why and how to fix the issue. This article will explain how your car‘s charging system works and the most common causes of a failing battery. Read on to discover the steps you need to take to get your car back up and running.

Parts of the Car‘s Electrical Charging System

Your car battery may not be responsible for the actual movement of your vehicle, but it is essential for your car to receive the power it needs to start the engine and provide power to parts of the car.

Without a charged battery, you won‘t be able to use critical components like the starter, main relay, computer, and fuel pump.

Without a functioning spark plug, the spark needed to crank the engine won‘t be created. We may sometimes confuse a problem with the charging system for a battery issue.

The battery may be able to provide the voltage needed to power the vehicle. Still, it won‘t recharge while the vehicle runs if the charging system (alternator, voltage regulator, and drive belt) isn‘t working.

To ensure nothing is missed, it‘s best to follow the same troubleshooting process for both potential issues.


Steps to fix the issue:

Human error

If your car won‘t start due to a dead battery, it is likely because someone forgot to turn off their lights. This could be the headlights, trunk lights, or interior lights all of which can drain the battery overnight. To prevent this from happening again, you should jump-start your car and give it a chance to charge completely.

Inspect Battery and Connections

Ensure your battery is free of corrosion and any buildup of debris or grime. This can impede charging, inspecting the battery case for any signs of damage, such as dents, cracks, or bulging, as physical damage can impede the cells from functioning correctly.

Additionally, ensure that the battery cables are securely connected to the positive and negative terminals. Look for creases or frays along the cords.

Check Car Battery

If you have a voltmeter or multimeter, connect it to your battery to check the charge of the battery. A healthy battery should read 12.6 volts at rest and up to 14.6 volts while the engine runs (and it should spike while the engine runs).

Low voltage indicates the battery is not charged ultimately. If the voltage does not increase while running, it may indicate that you have a bad alternator or other charging components. You can perform a load test to get a more comprehensive assessment of your battery health.

This is usually done at a mechanic, battery dealer, or auto parts store. You will need to connect your fully charged battery to a load tester for the test. This will simulate the operating pressure your battery should be able to hold up too. If the voltage drops below 12 volts, it is a sign that you need a new battery.


What factors are causing the battery to lose its charge?

A car battery not holding a charge can be attributed to several different causes, such as parasitic draining, incorrect charging times, unfavorable operating conditions, and issues with the vehicle‘s charging system.

Parasitic Draw

An accessory malfunction or a blown fuse can cause parasitic draining. Your battery is able to cope with a mild parasitic draw for things such as radio memory or your alarm system. However, a greater draw will drain it completely.

Making short journeys only

If you usually take short trips when driving your car, the battery may not have enough time to recharge. This is unlikely to happen for most drivers, but if you think it is the case for you, let your car idle for a while to fully charge the battery and see if it keeps its charge afterward.

If this is a recurring problem, you may need an external charger to maintain the battery or plan some longer trips to help recharge it.


It’s essential to be aware that if you start your car in cold weather, the battery will discharge quicker than it would in warmer temperatures. If you’re having trouble starting your car in the winter, the cold weather could be the cause.

However, your car should still be able to start and keep the power running. This is typically caused by an aging, faulty, or failing battery.

Charging System Issues

Suppose your car battery is not maintaining a charge while on the road. It is likely due to an issue with the charging system. This system comprises components that generate and regulate electricity to recharge the battery.

To diagnose potential problems, inspect the parts for signs of wear and tear (especially the alternator belt, which will become visible with time). You may also need to use an ammeter or multimeter to confirm if a replacement is necessary.



If you have any issues with your car battery or charging system, do not delay to seek help. Even if the issue may seem minor, it can have a negative effect on your entire electrical system.

Try to identify the problem by going through the troubleshooting steps, but do not hesitate to have a mechanic look at it if needed. Simple electrical problems can often be solved quickly. However, if left untreated, the situation can become much worse.

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