Will a USB In-Car Charger Kill Your Car’s Battery?

by Waseem S on December 19, 2022

In this blog post, we'll take a closer look at how USB In-Car charger work, their benefits and risks, and whether or not they can damage your car's battery. Most of you experienced the frustration of a dead phone battery at some point. And if you're like me, you've also experienced the frustration of finding a way to charge your phone while you're on the go. One solution that has become increasingly popular is using USB in-car chargers. But are these chargers as safe and effective as they claim to be? I

If you're wondering whether or not a USB in-car charger is suitable for you, read on!


What is a USB Car Charger, and How do they work?

Car Charger

USB car chargers allow you to charge your USB-powered devices, like your smartphone or tablet, while on the go. They plug into your car's cigarette lighter socket and usually have one or two USB ports so that one can charge multiple devices simultaneously.

Most USB in-car chargers have built-in safety features that protect your devices from overcharging, so you don't have to worry about damaging your battery. However, there are a few points you should keep in mind when using a USB in-car charger:

  • Make sure the charger is rated for the voltage of your car's battery. Most car batteries are 12 volts, but some luxury vehicles have 24-volt batteries. Using a charger not rated for the correct voltage could damage your battery.
  • Don't use a USB in-car charger with a device that draws more than 2 amps of current. Some high-powered devices, like iPads, require more than 2 amps to charge appropriately. Using a charger that can't provide enough current will result in slow or no charging.
  • If possible, plug the charger into an accessory outlet (also called a "cigarette lighter socket") closer to the battery. This will help reduce voltage drop and ensure your device gets the full power it needs to charge quickly.


What are the benefits of using a USB in-car charger?

USB Charger

A USB car charger can offer several benefits over traditional methods of charging your devices while on the road. Perhaps most importantly, it can help to keep your car's battery from being drained by your devices.

USB in-car chargers draw power from your car's cigarette lighter socket. This means that they are not connected directly to your car's battery and, as such, will not drain it as quickly. This can be especially important if you use power-hungry devices such as tablets or GPS units.

Another benefit of using a USB in-car charger is that it allows you to charge multiple devices simultaneously. Many models come with multiple USB ports so that you can charge your phone and GPS unit at the same time. This can be a real time-saver, particularly if you are travelling with multiple people who all need to keep their devices charged.

Finally, USB in-car chargers are often much more affordable than traditional car chargers. This is because they use standard USB cables, which are widely available and relatively inexpensive.

So, if you are searching for a way to charge your devices on the go without draining your car's battery, a USB in-car charger may be the perfect solution for you.


What are the risks involved in using a USB in-car charger?


Regarding car batteries, the biggest risk posed by using a USB in-car charger is overcharging. Suppose your charger is not explicitly designed to stop charging once the battery is full. In that case, it could continue to draw power from the battery even after its maximum capacity. This can lead to damage to the battery cells and reduced performance. In worst-case scenarios, it could even cause the battery to catch fire.

It's also important to know that not all USB in-car chargers are created equal. Some cheaper chargers on the market may not have adequate safety features, so it's important to research before purchasing one. Make sure to look for a charger with built-in overcharge protection and short circuit and overheating protection.

Another potential risk of using a USB in-car charger is that it can sometimes strain your car's electrical system if used excessively. This is usually only an issue with lower-quality chargers, but it's something to be aware of nonetheless. If you start noticing your car's lights dimming or flickering when you use your charger, it's probably time to upgrade to a better-quality model.

In general, as long as you choose a good quality charger and don't use it excessively, there shouldn't be any issues with using a USB in-car charger. However, it's always best to err on the side of caution and consult with a professional if you have any doubts.


Does using a USB In-Car charger damage your car's battery?

USB In-Car Plug

When it comes to car batteries, there are two main types: lead-acid and lithium-ion. Lead-acid batteries are the common type used in cars, while lithium-ion batteries are often found in newer electric vehicles. Overcharging can damage both batteries, but lead-acid batteries are more susceptible to this damage.

USB in-car chargers typically have a voltage of 5 volts and a current of 2.4 amps. When charging a lead-acid battery with a USB in-car charger, the battery will charge faster than a standard car charger. However, this also means a greater risk of overcharging the battery. Overcharging a lead-acid battery can damage the battery cells and shorten the battery's overall lifespan.

Lithium-ion batteries are less likely to be damaged by overcharging than lead-acid batteries, but it is still possible. When charging a lithium-ion battery with a USB in-car charger, the voltage will be lower than with a standard car charger. This reduced voltage means less risk of overcharging the battery; however, it also means the battery will take longer to charge.


Vibe Ultra Fast Dual USB/PD Car Charger- 24v 5 amp

 Vibe Ultra Fast Dual USB/PD Car Charger

Are you tired of waiting forever for your phone to charge in the car? Then you need the Vibe USB/PD Car Charger! This charger features two USB A ports that can deliver a combined 24W of power, so you can charge two devices at once at full speed. Plus, it's ultra-compact design means it won't take up much space on your dashboard. And, it's finished with a scratch-resistant alloy surface that will match even the most pristine car interiors. So ditch your old car charger and upgrade to the Vibe USB/PD Car Charger today!



In conclusion, it is safe to use a USB in-car charger to charge your car's battery; however, some risks are involved. If you are using a lead-acid battery, there is a greater risk of overcharging and damaging the battery cells. Lithium-ion batteries are less likely to be damaged by overcharging; however, they will take longer to charge when using a USB in-car charger. It is necessary to do your research before purchasing a USB in-car charger and to make sure that you choose one with adequate safety features.