Most Malaysians don't think about their car batteries enough. For example, have you ever given any thought as to what drains a car battery even when the car is off? Or why are there car batteries that die overnight even if you turn off all the lights?

Those are great questions to ask, and as a daily driver, it will save you from dealing with the headache of having your car battery die when you need it the most!

In this article, we'll quickly list the things that can drain a car battery even when the car is off. We'll also provide you with a few tips on where to find car battery check or car battery replacement services.

5 Reasons Why your Car Battery Drains even when the Car is Off 

1.  Your car battery discharges because it is old 

How long has it been since you last replaced your car battery? If you have been using it for over four years, then the most probable cause of your car's battery draining when the car is old-age wear and tear. This simply means it can no longer hold a full charge, as a car battery needs to. A typical car battery needs to be replaced every 3-5 years to ensure your car performs optimally. However, a well-maintained car battery that is of high quality can usually power your car to a maximum of 5 or even slightly more.  On the other hand, a poorly-maintained battery may require replacement in as quickly as 3 years.

Hence, a car battery that drains overnight is a sign that your car battery has reached the end of its lifespan.

2.  Your car battery has a corroded alternator diode 

If you've recently replaced your car battery and it still drains when you've turned your car off, one of the likely culprits is your car's alternator.

Your car's alternator is directly responsible for recharging your car's battery as well as powering the various electrical requirements for your car, such as the car's entertainment unit, various lights, the car's ignition, and so on.

In this case, a corroded or defective alternator diode can often continuously charge your car's circuit even when you car is turned off. This will drain your car's battery and cause the car not to start in the morning!

3. Your car is experiencing electrical glitches 

In some cases, electrical glitches do happen in cars, and your car battery may be due to a few factors, including faulty fuses, poor installation and even flawed wiring. These electrical glitches can often accelerate the expected drains on your car's battery to excessive, hence draining the battery even when the car is off.

4. Your car has an ineffective charging system 

This happens when you car's battery-charging system is not functioning as it normally should. This results in a drained battery when the car is off - or even a possible car battery death while you 're driving!

This often stems from either loose connections to your car battery or corroded tensioners. A car battery that is not well-charged will have to strain itself to power all the car components mentioned above, and will run out of charge when you turn your car off!

5. Your car battery is poorly maintained 

Lastly, car batteries that drain quickly are often the result of a poorly-maintained car's battery! If a car's owner neglects to keep their car battery clean and well maintained, it shouldn't be a surprise that the car battery drains at an abnormal rate.

For example, the common issue that car owners neglect is the layer of acid or dirt that accumulates around the top of a car battery. If it's not removed and left to accumulate, the car battery will start to leak its charge. This leak will also continue to accelerate to the extent of massive drainage overnight that leads to a dead car battery the next morning!

Why Ex Power Services is Recommended for Drain Batteries 

Rain or shine, day or night, Ex Power delivers car batteries or repair services to your doorstep.

With Ex Power's all-day roadside assistance, we provide free checking car battery service to certain locations. You'll also enjoy immediate car battery repair and replacement services exactly when and where you need them! our services come with:

✓ Free installation

✓ Free checking

✓ Free delivery

Check us out at https://www.expower.com.my/ or call us now at +6010 888 9166.