Can I Use A Lower Voltage Charger For My Laptop? Answered

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If you have faced the following issue, Can I Use A Lower Voltage Charger For My Laptop? Then you’ve come to the right place. It is imperative to check the charger’s voltage rating in this scenario. Is it possible to make an informed purchase decision once you’ve done this?

Using a higher- or lower-voltage charger isn’t an option when there’s a voltage mismatch. Therefore, you’re left wondering: These questions will be answered today. To help you choose the proper laptop charger, please read the following information.

Can I Use A Lower Voltage Charger For My Laptop?

It is not ideal. This is because the laptop’s architecture limits the power it can consume. You won’t have any problems because a higher-wattage charger can easily supply this power. In a different vein, the issue of a low-wattage charger. Using a charger with a lesser wattage is not recommended.

Lower Voltage Charger For My Laptop

Use A Lower Voltage Charger For Laptop

Your laptop will not charge using a lower voltage charger. The lower voltage charger can capture the battery at a snail’s pace. It may not be able to support the laptop’s operation either.

Higher Voltage

A higher voltage is harmful to the laptop and could cause it to malfunction or even fail. My HP laptop was destroyed when I used an over-charged charger just 0.5% above its stated output power level. As far as I can tell, I gave it 19 volts instead of 18.5 volts.

Even though the plug and polarity were identical, my EE101 lecturer said to us that tolerance of 20% of the spec is considered acceptable in the world of electronics. An extra half a volt, for whatever reason, caused one of the laptop’s components to explode and fry and unleash a cloud of smoke.

Lower Voltage

The laptop will still be damaged, but it won’t be destroyed instantly if you reduce the voltage to a lower setting. The computer may not charge or charge at a much slower rate. It may not have enough wattage to handle a significant compute load (launching a game, editing a movie, doing 3D stuff, etc.), it may become unstable and crash.

The laptop could be damaged in the long term because it requires more amps to get the same amount of watts when operating at a lower voltage than specified. The laptop may function at a lower voltage, but some components may be subjected to higher-than-intended currents, putting them at risk of failure early on in their lifespan.

The more significant the voltage difference, the more deadly it is, regardless of what rating you’re using. A 20-volt laptop may run for years on a 19-volt charger, but a 12-volt charger may kill the same notebook in a few days. Another possibility is that you’ll have bad luck, as I did, with a laptop that dies when charged with a charger that is only 0.5 volts too high.

What Happens If You Use A Charger With A Greater Or Lower-Rated Voltage?

Today, I’ll discuss what occurs when using a higher or lower voltage charger to charge your laptop. Let’s begin with the issues that a lower voltage charger can cause.

Using The Lower Voltage Charger

Slow Battery Charging

Slow battery charging is a significant reason to avoid using a lower voltage charger. For example, when charging a laptop battery, a lower voltage charger can take up to 2 and a half to three hours. You won’t be able to use the laptop’s battery due to this.

Lack Of Power Support

While plugged in, you may not be able to work if the voltage is too low. As a result, the laptop won’t be able to function correctly. If this is the case, the components and the motherboard will not handle the workload. In this instance, the laptop won’t even begin to function.

In a nutshell, the lower voltage charger can cause the laptop to not turn on numerous times. Now that you know what can happen if you use a lower voltage charger to charge your laptop, you can avoid it. Look at the other side of the coin as well.

Lack Of Charging

There may be a lack of charging if the voltage rating is too low. As a result, the battery is unable to be recharged at all. Your laptop will automatically shut down if there is a power outage. You won’t even have a chance to save your work before you have to go. Attempting to do so would be counterproductive.

Can You Charge Your Laptop With A Lower-Wattage Charger Without Harming It?

Using a lower-wattage charger would not negatively affect your smartphone or its performance in the real world. To avoid overheating your laptop and destroying your battery, it is best to use external power when the laptop’s battery is full. If your laptop’s battery needs to be recharged, make sure you’re not using it while it does so.

Doing so will increase the life period of your laptop and its battery simultaneously. If you find yourself in an emergency circumstance where you need to charge a high-powered device, you may want to consider using a lower-wattage charger, despite the risks involved. If you keep using a lower-wattage charger, you’ll be putting your gadget in danger of serious harm.

Can I Use A Higher Voltage Charger For My Laptop?

You can use a laptop charger with more significant power, but there are some restrictions. A laptop charger’s wattage rating is a maximum rating, which indicates that it can power devices up to that rating’s output watts and, of course, anything in between.

Will A Lower Voltage Charger Work?

A charger with less wattage is a different matter. It is not best to use a charger with less wattage.


In reality, Can I Use A Lower Voltage Charger For My Laptop? Using a lower-wattage charger can cause issues with your power supply. Higher power chargers for laptops can be used if the voltage and polarity requirements are met. When charging your laptop, make sure you’re using the proper charger to prevent damage.

Frequently Asked Questions

Do lower voltage chargers have any adverse effects?

As long as the current is the same, the adapter may still work, if its voltage is lower than the devices. The majority of the time, an under-voltage state will not harm or shorten the life of your gadget.

Is it possible to use a different voltage charger to power my laptop?

A laptop’s battery could be harmed if you use an incorrect voltage rating charger. Too much voltage is usually to blame. However, your laptop will not be damaged if you use a charger with an excessively high current. However, the laptop will not be damaged if you use a low enough current rating charger.

Is it possible to use a 12V laptop adaptor with a 19V laptop?

No, that’s a good one. Why? Your laptop needs 19 volts, and you only have 12 volts available. You may use a 24-volt charger for any other device, but you’ll need the charger that came with the laptop or a new one if your old one is destroyed or misplaced.

I have a 19-volt laptop; can I use a 20-volt charger with it?

A charger of the exact specifications and type should be used. Only momentarily can 20v be used for 19v if the current rating of 20v is equal to or higher than that of 19v. To ensure the correct input to the circuitry, it is best to charge the battery and then unplug and run the laptop, notebook, etc., on their batteries.

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