Does Leaving USB In Car Drain Battery

Does Leaving USB In Car Drain Battery

These days, most cars come with built-in USB ports for audio or data input and output. They are perfect for listening to music, playing videos, or charging your phone through a hands-free interface. However, the question remains – does leave a USB in-car drain battery? Is it dangerous? Well, let’s get these answers one by one.

Does Leaving Usb In Car Drain Battery?

Yes, it can. If you’re not using your car very often, USBs (and other devices) that are plugged in and drawing power can drain the battery. To prevent this, you can use a battery maintainer to keep the battery charged when the car isn’t in use.

What Causes USB To Drain Car’s Battery?

  • Unnecessary USBs

If you have a USB port in your car, and you only use the audio function, the car’s battery won’t be drained. But if you have a USB port that is unused, it will still drain the battery when it’s plugged in. Many people don’t realize that they can unplug their devices from USB ports when they aren’t in use.

  • Unnecessary Software

Most people don’t realize that there are applications that need to run on their computers or smartphones in order to function properly. The operating system is responsible for managing all applications and preventing them from running in the background and consuming unnecessary power. If your computer doesn’t have enough power to run these applications, then it can cause a drain on your car battery. In addition, unnecessary software like antivirus software may also cause a drain on your car’s battery if it’s not configured correctly to avoid excessive memory usage.

  • Games and Video Apps

Do you have a video game or an audio application that’s always running in the background? If so, you can drain your car battery. When games or applications are constantly running in the background, they will require more resources to run than if they are only used occasionally. This can cause your car’s battery to drain quickly when it’s not being used.

  • Unnecessary Connections

If you have a tablet or smartphone with a USB port, you may not realize that you’re consuming power even when your device is off. It’s important to unplug your devices when they aren’t in use so that the battery doesn’t drain unnecessarily. If you want to charge your device’s battery while it is off, then leave it plugged into AC power instead of a USB port when possible. The same goes for other devices like wireless printers and scanners that use wireless technology instead of connecting through USB ports directly.

  • Unnecessary Accessories

If you have other devices which aren’t being used at all, they will drain power from your car’s battery if they’re plugged in. This is especially true for USBs, as most of these devices are designed to be plugged in whenever you’re using them. If you have a device that doesn’t need to be plugged in when it’s not being used, it will drain the battery. For example, if you have a portable speaker that is only used with your phone, it will drain your car’s battery when the phone isn’t being used.

  • Bluetooth Devices

Bluetooth devices are another source of power drain for your car’s battery. If you use a device that is connected to your phone via Bluetooth such as an app or music player, it will consume more power than necessary and can cause your car’s battery to drain quickly when it is not being used often enough. This can also happen if you use the same device on different devices without turning off the Bluetooth connection between them or uninstalling them from all of your devices before doing so.How To Prevent Usb From Draining Car Battery?

  • Remove the USB from In-Car Charger

The first thing you need to do is remove your USB cable from the charger. There is no point in charging your phone, or any other device, through a USB cable that has been connected to a car charger. This will only drain your battery and may cause problems in the future.

  • Use an Original USB Cable for Charging

You can use your original cable or one that is compatible with your device. It should be long enough to reach all the way from the charger to the battery of your car – about 6 feet. However, if you have a small vehicle and don’t have any extra space behind your seats, you can also use an extension cable instead of cutting it down. You can buy them online at Amazon, eBay, or another reputable store where that sells all kinds of electronic accessories.

  • Leave Your Phone on Car’s Dashboard During Driving

This is one of the most common mistakes people make while using their phone while driving – they leave their phone on top of the dashboard of their car while they are driving down the road! There are many reasons why this practice is dangerous – it distracts you from driving safely and also drains batteries very quickly when connected to a car charger! If you want to prevent this problem, simply put your phone on top of the dashboard and drive away without using it at all! Or better yet – remove it completely from inside the car and keep it in your pocket. That way, you won’t be tempted to use it while driving!

  • Use External Car Charger or Buy a New One

If you want to prevent the problem of leaving USB charging in the car, you can simply get an external charger that is compatible with your phone. You can also buy a car charger that is specifically designed for your phone if you don’t have one already. The problem with these kinds of chargers is that they are often big and bulky – not very convenient for using them when driving! If you don’t have any other option, just get one – it will be worth the money spent!

  • Switch to a Hands-Free Charger

There are many different devices that are designed to be used while driving – they are called hands-free chargers. The best ones are those that have built-in Bluetooth speakers and play music from your phone or another device through them. This way, you won’t have to worry about leaving your phone on top of the dashboard and draining your battery! However, if you don’t want to buy one of these, you can always use an iPhone car mount or dash adapter and place your phone in its holder while driving. That way, you won’t be tempted to use it at all!

5 Tips To Remember

  • Don’t forget to turn off the port when you are done using it. If you don’t, the port will continue to draw power from the car’s battery, which can drain it completely.
  • f you connect a device to the port, be sure it’s the right one. Otherwise, it may cause damage to your car’s electrical system or your device.
  • If the port isn’t working, or if you’re experiencing other issues, take your car to a technician.
  • Don’t leave a phone connected to the port while the car is turned off. This will cause the phone to stay charged, even if you don’t use it.
  • Make sure your car’s electrical system is up to date. If it isn’t, it may not be able to handle the current drawn by the USB port.

Why Leave USB Port In Car Drains Battery?

  • USB Ports in Car Can Be Damaged by Heat. You cannot just plug a USB cable into your car and expect it to work. The reason is simple. The inside of a car is usually very hot, which can damage the wires in the USB cables. So, to keep your precious devices running smoothly, you need to keep an extra USB cable close by.
  • Overheating Causes Damage to Components. The USB ports in cars can get damaged due to overheating if they are left unused for long periods of time such as overnight or while parked in the sun. They are vulnerable to overheating because they are exposed to high temperatures while charging and data transferring at the same time.
  • Overheating Can Cause Components to Breakdown. The components inside the USB ports of a car can also be damaged due overheat if they are left unused for too long or are exposed to excessive heat during charging or data transfer. This can lead to wear and tear on components and even make them faulty – resulting in slow performance or even complete failure of the device that has been plugged into these ports.
  • If You Are Leaving Your Phone Charging While Driving, It Can Burn Out Your Car’s Charging Port!
  • ost Cars Have No Wiring for External Power Input
  • Your Phone Will Be Disconnected from Bluetooth if Connected Through USB Port
  • Your phone will be disconnected from Bluetooth if connected through the USB port.
  • You will not be able to connect any accessories or Bluetooth devices while the phone is connected through the USB port.
  • Your car battery might be drained if you leave the phone charging in your car overnight
  • The car’s USB port might get faulty if it is left unused for long periods of time, causing slow performance or even complete failure of the device that has been plugged into these ports.


These days, most cars come with built-in USB ports for audio or data input and output. They are perfect for listening to music, playing videos (or) charging your phone through a hands-free interface. However, you must remember that the USB port in your car is not designed to charge your phone. It is designed to play music through your car’s speakers or charge an MP3 player. You should always make sure that you are using the right device to prevent charging your phone with a low voltage. If you follow these simple steps, you can prevent USB ports in your car from draining your car’s battery.

Shirley Wesley
Shirley Wesley is a tech blogger who loves to share her insights on the latest gadgets and software. She has a passion for helping people learn new things, and she enjoys writing about her findings in an easy-to-understand way.