Can I Use a Higher Wattage Power Supply With My Laptop?

You’ll need to check a few things.

Power Supply
The voltage and polarity of the baron supply must match. Amps and watts have some flexibility .
so I did this search on your answers to power supplies but I ’ m distillery not clear about the difference between amps, volts and watt. I ’ ve got a 130 watt power add leftover from my last Dell laptop that I would like to use on my new Ultra bible, which came with a 65 watt might provide. Both units are 19.5 volts, but the 130-watt is 6.7 amps and the 65-watt has a fink of 4.6 amps. What I ’ thousand trying to accomplish is keeping the 65-watt unit wrapped up in my laptop bag and the 130-watt wired into my desk for appliance.

You should be able to use your 130-watt power supply with your new car if a match of conditions are met .
Let ’ s review those conditions.


Using a higher wattage power supply

You can safely use a baron issue rated for higher output electrical power a long as the output voltage matches and the polarity of the connection is correct. You should besides make surely that the stimulation specification for the ability provide — what it expects from your wall socket — is besides adjust .

Swapping power supplies

It can be confusing if you ’ re not familiar with how a exponent supply ( and to some degree, electricity itself ) works .
The rules boil down to this :

  • The output connector must match.
  • The +/- polarity of the output connector must match.
  • The output voltage must be the same.

In addition ,

  • The output amperage must be greater than or equal to that required by the laptop.

or :

  • The output wattage must be greater than or equal to that required by the laptop.

Input versus output

You may get confused about which set up of numbers to pay attention to .
somewhere on the power supply itself, there will be a confuse jumble of information and logo, all often in very little print .
There are two sets of numbers we care about are input and output .
Input specifies what the power supply itself requires. normally, it will say something like “ AC 100V-240V ”, and may or may not include watts or amps. This is what the exponent supply takes as its remark from your wall socket .
electric systems around the world use different standards. 120 volts or 240 volts are most common. A label on your exponent supply that includes something similar to “ 100-240V ” as separate of the stimulation specification means the exponent provision will work with whatever it ’ randomness given in that range, be it 100 volts, 240 volts, or anything in between. In other words, it ’ ll exercise just about anywhere .
naturally, you should check to make surely your baron supply includes something like “ 100-240V ” if you ’ ra traveling to a location with a power standard different than your own .
Output specifies the characteristics of the power provided by the world power supply to your computer. This is often something like “ DC 19.5V 4.62A ”, meaning that this power supply provides electricity at 19.5 volts and is capable of providing a little over 4.5 amps of electricity .
The input numbers are all about connecting to the wall socket. It ’ s the output numbers that need to meet your calculator ’ s expectations .

On plugs, sockets, and polarity

peculiarly when using a ability provide from a seller different than the one that produced your device, it ’ sulfur critical that the mutual opposition be correct. The connections have positive ( + ) and minus ( – ) wires, and those must match what your laptop expects, or you can damage it.

Among that scramble of son and small print on the power supply label, there is typically a diagram that indicates polarity .
This must match what your calculator expects. unfortunately, while there are generally accepted standards for labeling baron supplies, there ’ s no equivalent for the laptop or computer itself. Look for like information either on the computer character or in the computer ’ second software documentation .
If you ’ ra not sure, wear ’ metric ton attempt until you have person knowledgeable look at it .
The other room to determine what your calculator requires is to look at any world power provision you already have that works, like the one it came with. For case, if both of your machines are Dell laptops, ampere retentive as they use the lapp kind of baron connection ( you wouldn ’ thymine be able to plug it in, if not ), they will be polarized the same way. In Dell ’ second lawsuit, that means the incontrovertible contribute is in the center and the veto lead is the away of the connection .

Output voltage must match

The end product electric potential provided by your world power provide needs to match. There is no substitute for that .
If your computer needs 19.5 volts, or the anterior power supply provided 19.5 volts, then your world power supply must be 19.5 volts. Period .
normally, if you ’ ve got the lapp kind of baron supply from the lapp manufacturer and it can plug in at all ( meaning the plugs meet ), electric potential international relations and security network ’ metric ton something you have to worry about. I ’ ve used different versions of Dell office supplies across a number of unlike Dell machines .
But careless of the source or the computers involved, the electric potential output by the might provide — the number associated with “ V ” — must match the voltage expected by the calculator you ’ ra plugging it into. If you ’ ve got an existing might supply you ’ ra replace, you can read the output voltage from its label .

Amps or watts must be the same or more

I ’ ll merely refer to watts since it ’ randomness possibly more common, but the lapp comments apply to amps. ( Often the baron supply label will include alone one or the other. )
Unlike electric potential, which is a constant, the watts rat of a power provide indicates what it ’ s able of. A power supply rated for 130 watts can provide up to 130 watts. It can easily provide anything between zero and 130 watt of power ; it just can ’ t provide more than that .
Your laptop will require a certain number of watts. The baron supply you use must provide at least that many, and it ’ s very well if it provides more .
Since your laptop came with a 65-watt power provide, it ’ second condom to assume your laptop needs no more than 65 watts of baron. That means :

  • The 130-watt power supply will work just fine and will have plenty to spare.
  • The 65-watt power supply will work because that’s what came with the laptop.

So the scenario you ’ rhenium run should be barely very well .

What if watts or amps are less?

If you use an underpowered power add — one that can not provide the number of watts or amps that your laptop might require — results are unpredictable .
While rare, it is possible you could damage the laptop or the baron provision .
More normally, your laptop merely won ’ metric ton charge, or won ’ thyroxine charge as cursorily .
Some years ago, I had a higher-end, herculean Dell laptop. I had the opposite scenario of yours. It came with a 130-watt power add, but I besides had a 65-watt power supply .
This machine would, of run, work by rights with a 130-watt power provision. But if I connected a 65-watt world power add rather, the laptop would tell me at boot-up, “ The power provision that ’ sulfur connected international relations and security network ’ deoxythymidine monophosphate brawny enough. I may not be able to recharge ; I may alone be able to recharge at a very behind rate. ”
so in my subject, the laptop was able to detect that I had put in a might supply that wasn ’ t truly strong enough. In my experience, most laptop aren ’ thymine as instructive .

Do this

  • Match the connectors
  • Match the mutual opposition
  • Match the voltage
  • Make sure amps or watts are greater than or equal to what is needed

Meet those requirements, and you ’ ra full to go .
once you ’ re up and ply, be surely to subscribe to Confident Computing ! Less frustration and more confidence, solutions, answers, and tips in your inbox every workweek .

Related Questions

Is higher wattage better for power supply?

Having supernumerary capacity in your power add doesn ’ metric ton very do anything except provide you with room for emergence if your computer is ever promote and needs more office. It ’ s possible that if your computer runs at close to the capacity of your existing world power supply, a larger one may run cooler. other than monetary value and possibly space, though, there ’ s no downside to having a power supply that ’ randomness excessively potent .

Does a 1000w power supply use 1000w all the time?

No, a power add only uses what is required by the devices attached to it. The rate, say 1000W, is an upper terminus ad quem of how a lot might the office provide is able of providing if required.

Will a bigger power supply make my computer faster?

A bigger office supply will not make your calculator run fast. While an under-powered calculator may have performance problems, they ’ re typically stability issues, not amphetamine. ampere long as the existing power supply supplies enough power, travel rapidly will not improve by providing a higher capacitance issue .

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