When purchasing a new laptop or netbook, owners have no idea how many problems they will have to face in the future: overheating of the graphics adapter in hot weather, slow processor operation, damaged touchpad and dust inside the case. All these problems can be solved with one trip to the service center. But even if they appear, you can still work quietly on the laptop for some time, reducing the load on the video card, connecting ventilation and additional peripheral devices.
But you should also be prepared for the fact that one day the device will stop charging and working, which will lead to significant problems.
Why won't my laptop charge?
There are several reasons why the charge will not reach the laptop:
- Faulty pilot.
- Bloated
- Broken power supply.
The biggest problem is a damaged power supply, since the pilot can be easily replaced, the battery removed and operated only from the mains. Finding out whether there is a problem with the laptop power supply is very simple: for example, almost any charger for Asus is equipped with an indicator light. If it stops burning, then the probability that the power supply has burned out is almost 100%. But there is no need to despair. Choosing a new laptop charger is very simple.
However, before you make a choice, it’s worth finding out what it’s for.
What is the power supply responsible for?
In addition to the fact that in various gadgets, including Asus, the laptop charger supplies power to the battery and guarantees stable operation, it:
- Works as a fuse against power surges.
- Converts 220V voltage to one suitable for a laptop.
But in order for the charger to work for more than one year, it is important to choose it correctly.
Main characteristics of the power supply
Sometimes it is difficult to choose a charger for an Asus laptop. The price of original power supplies is usually high: from $40 and above. However, for different brands of devices, including Asus, the laptop charger has several characteristics:
- Output voltage. What is the same between the MSI gt780dx, the Dell 3151 and the Charger, or rather, its output voltage. This indicator coincides with the voltage that the laptop consumes. The error can range from 3 to 5%. For example, the voltage supplied by the Asus laptop charger is 19V.
- Maximum power. Each laptop model is given a maximum power consumption. The number should not be less than the output voltage. For example, the Asus model. consuming 70 W will work perfectly from a power supply with a power of 100 W or more. If the charger does not indicate the maximum power, it can be calculated. Multiplying the output voltage by the maximum allowable current (in amperes) gives the maximum power.
- Plug. The most important aspect when choosing a power supply is the connector. Almost all blocks have the same plug: a hollow cylinder. The connector is characterized by its inner and outer diameter and polarity. It is important that the power plug fits tightly into the connector, otherwise the supplied voltage may change polarity, which will adversely affect the operation of the laptop.
Universal or original power supply?
If your Asus laptop charger fails, the price of a new one can be very high. This applies to almost all laptop models. Therefore, many owners are wondering: why not buy a universal charger? There are several advantages in favor of this solution:
- lower price;
- availability in stores;
- wide choose.
Undoubtedly, it is easier to find for an Asus laptop. The price will not be so “biting”. But it is with the original power supply that the laptop will work better.
Durability
For popular computer models - Dell, HP, Lenovo, Asus - the laptop charger has several nuances. Firstly, power supply manufacturers provide rollback operating time. It is this characteristic that guarantees a long service life.
Such models of chargers are somewhat more expensive than universal ones, but a guarantee for a certain number of hours of operation is a sign of high quality. Information about the power supply can be found on the product packaging. Typically, such chargers last at least 3-5 years.
Where can I buy?
When a laptop charger fails, many owners wonder: where to buy a new power supply? For HP, Lenovo, Dell, Acer and Asus brands, a laptop charger can be purchased in specialized stores. But often the required power supply model is not always available there. Then you can contact stores that sell peripheral devices.
However, the easiest option is to order a power supply from a specialized store. When purchasing universal models, you need to carefully read the characteristics. When purchasing an original charger, simply place an order.
You can also use the services of well-known online stores. On such sites you can always find a suitable charger model, as well as choose the product that will cost less. The advantage of such a purchase is that you can purchase a power supply at a special price.
A breakdown of any component of a laptop is always a problem that requires the fastest possible solution. But the main thing is not to choose peripheral devices, including the power supply, from unverified and unknown manufacturers. Then the laptop will serve for a long time and without unnecessary failures.
Naive laptop buyers think that the adapter and laptop will live happily ever after and “die” in one day. This is ideal. The reality is harsher: it’s a rare charger that “survives” to an old age. Wires crushed by something heavy or sharp, a sudden voltage surge in the electrical network, spilled juice - in an ordinary apartment, the adapter faces many dangers.
Repairing a broken device is too difficult and expensive; it’s easier to buy a new device. We learned from specialists in laptop components how to choose a laptop charger so that it fits perfectly.
Laptop power supply compatibility
The main criterion when choosing a network adapter for a laptop is compatibility. This means that the parameters of the power supply fully correspond to the computer ones, and charging will occur correctly.
The original power supply fits the laptop perfectly: the manufacturer has already taken care of the compatibility of its components. When choosing a branded laptop charger, it is enough to know the brand and model of your laptop.
More nuances should be taken into account when purchasing a compatible analogue. Such products usually fit laptops of different brands or models.
How to choose a power supply for a laptop: the most important parameters
Now - in more detail about the main characteristics that must be taken into account when choosing a compatible power adapter.
Input current
It is measured in volts and is indicated by the letter V on the nameplate of the power supply case behind the word Input. Most adapters have a range of 110-240 Volts, which is suitable for charging in Ukraine and other countries.
Output voltage
A parameter that influences the choice of power supply for a laptop. Indicated by the number of volts behind the word Output. It should match the input voltage of the laptop, at least not less. If the difference is too large (more than 5%), the laptop simply will not turn on. The indicator on different models is from 15 to 20V.
Output current
Calculated in milliamps (mA) or amperes (A). A characteristic that determines the operation of the power supply. If the value is less than that indicated on the laptop, the charger will burn out. Large values give the network adapter a reserve of power - this is good.
Laptop power supply power
The value is measured in watts (W). You need to select according to the principle: more is possible, less is bad for the charger. The higher the power of the charger, the more stable it will work and the less it will heat up.
Plug type
Another important nuance that needs to be taken into account if the laptop power supply is broken and you are choosing a new one. Just a millimeter difference between the power supply connector and the inlet on the laptop and it will be impossible to charge the computer. The plug must fit the laptop exactly, especially for compatible models.
Standard types of connectors:
- In the form of a cylinder with a central contact in the center.
- Round plugs, hollow inside.
- Rectangular connectors. Chargers are quite rare (for example, in some Lenovo models).
Don't know what to do if your laptop charger is broken? – contact Batterion. Qualified employees will help you choose an original or compatible power supply, as well as other components for your laptop. A competent approach - and the laptop is always in order!
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Hello, dear readers.
Today we will talk about choosing a power supply for a laptop. What is a power supply for a laptop is probably not necessary to explain? Everyone has seen this black box with two wires.
Essentially, this is a switching power supply that converts mains voltage into the voltage necessary to charge the laptop battery and operate it. The power supplies are included with the laptop itself. If you are thinking about buying a new one, it means a sad thing happened and the old one either burned out, was lost, or your pet chewed off all the wires from it. It is better not to throw away a faulty power supply. It may be useful for choosing a new one. However, sometimes it is convenient to have two adapters if you use a laptop, say, at the dacha and at home; it is not difficult to forget such a small thing when traveling to the dacha. In order not to carry an adapter with you, it is very convenient to have a pair. So, how to choose a power supply for a laptop?
Characteristics of power supplies
Let's start with the basic electrical characteristics. These are indicated on the label on each power supply. Sometimes the output characteristics are written on the laptop, on the label or near the power connector.
Input voltage.
If this is a mains power supply (I won’t dwell on car versions for now, I’ll tell you more about this below), then it is equal to 230 V. Yes, exactly 230 V. In Russia, according to the requirements of GOST 29322-92, the mains voltage should be 230 V at a frequency of 50 Hz Such standards are also in force in most European countries, and it is under this standard that all household electrical appliances are produced. Although out of habit we still call it 220 V. If the power supply says 100-240 V, then this one will also suit us. As I wrote above, these are pulse converters, and they have very wide input voltage tolerances. However, if you buy an adapter in Russia and use it here, you don’t have to pay any attention to this parameter.
Output voltage
This parameter can vary quite a lot depending on the manufacturer and model of the laptop - from 15 V to 24 V. Naturally, you need to select it with the same voltage as your old power supply. However, a small deviation (plus or minus 0.5 V) will not affect reliability and performance in any way.
Output voltage adjustment
The ability to adjust provides greater flexibility when selecting a power supply for your laptop.
It can be automatic or manual.
Manual adjustment consists of special switches directly on the device body. Each division must be signed with a value indicating the required number of volts.
Auto-adjusting adapters have stabilizers built right into their board design. This way you won't have to worry about manual shifting. All you need is to change the connector to a suitable one.
Power supplies with a constant voltage value are not adjustable.
Output current.
For the new power supply, this parameter should be the same or greater than that of the old power supply. If the maximum output current of the new adapter is less, the power supply will either turn off at maximum load or fail altogether.
output power
Since the output power is directly related to the current (who remembers physics, power is equal to the product of current and voltage), the recommendations here are similar. This parameter should be no less than that of your old power supply. If it is larger, then nothing bad will happen. And I’ll immediately tell you about the well-known myth that powerful power supplies consume more. No that's not true. The output power indicated on the block is the maximum power that the power supply is capable of delivering to the load and this does not mean that it will supply it constantly. The Bugatti Chiron hypercar reaches speeds of up to 420 km/h, but this does not mean that it can only be driven at that speed. As soon as you press the gas pedal, it will go. Likewise with the block, as much as the laptop asks from it, it will give as much. Let's say you had a 60 W power supply, and to replace it you purchased a 90 W unit. Consumption will not increase, the new unit will simply not work at full capacity, which, by the way, may well have a beneficial effect on its service life. So sometimes it is useful to get a higher power unit, especially if you are not sure about the manufacturer.
Well, perhaps one of the most important parameters is the connector type.
Of course, if the connector on the power supply does not fit the connector on the laptop, we simply will not be able to connect it. Unfortunately, there is no uniform standard for connectors for power supplies for laptops. Therefore, there are quite a lot of them now, which creates a certain confusion. Let's try to figure it out. Most units have a barrel connector with a pair of pins. External contact is usually negative. Such connectors are marked by the diameter of the outer and inner contact.
Here are some examples of the most common connectors today.
This type of connector is used in Samsung laptops. Has a thin central contact. The output voltage is 19 V.
The connector is used in Lenovo laptops. Has a thin central contact. The output voltage is 20 V.
This connector is used in Toshiba laptops. The output voltage is 15 V.
Used in Compaq and HP laptops. The output voltage is 18.5 V.
The two connectors are the same, but the power adapters have different output voltages: 16 V in power supplies for IBM, Lenovo laptops and 19 V in Acer, Compaq, Delta, Fujitsu, Toshiba and Liteon units. Accordingly, although they are externally identical, they are not compatible with each other.
Used in laptop adapters from Acer, Compaq, Delta, HP, Fujitsu, Gateway, Toshiba, Liteon. Output voltage 19 V.
Used in power adapters for Sony laptops. Output voltage 19.5 V.
The manufacturer, unfortunately, in most cases does not mark the connector anywhere. If you are confident, you can measure the connector with a caliper. Moreover, in such measurements even tenths of a millimeter are important, otherwise, if you take the measurements incorrectly, the connector may not fit. But it’s better to contact specialists at a service center or, if possible, check compatibility by bringing your laptop (or its charger) to the store.
Often, manufacturers of universal power supplies indicate on the packaging or in the instructions the types of connectors included in the kit and the laptops to which these connectors are suitable. Dell and HP (not all models) did the trickiest thing with connectors. Dell's power connectors, for example, have three contacts, one of which is signal. A special Dallas Semiconductor DS2501 EPROM chip is installed in the power supply and through this contact the laptop reads from it information about the power and type of power source; if it considers the power insufficient, it turns off battery charging or even does not start at all. This was done to protect the consumer from problems associated with low-quality power supplies. At the same time, it allows the company to raise prices for original components and put extra money in their pocket. However, this secret has long been solved and some manufacturers install this chip directly into the connector intended to power Dell laptops. So you don’t have to look for a branded adapter. However, sometimes, although support for Dell laptops is stated, there is no chip in the connector and such an adapter will not charge the battery. Some HP laptop power adapters have connectors similar to Dell connectors, but they are not compatible with each other. Well, naturally, the company that stands out in this regard is Apple, which produces original (and very convenient, by the way) magnetic connectors for its laptops.
To determine which power adapter you need, just visit the official Apple support page. It describes in detail which laptop needs which power adapter. And then you just have to pay two or three times more money for it than for an adapter of similar power and quality from other manufacturers. Style requires sacrifice.
However, such methods only encourage Chinese manufacturers to produce cheap fakes that are similar to the original only in appearance. In October 2016, Apple purchased a batch of accessories of its own production from one of the most famous online stores. After research, it turned out that 90% of what was purchased turned out to be fake. So buy power adapters only from trusted and reliable suppliers. It is very convenient if the manufacturer of the universal adapter places a label on the packaging with the dimensions and compatibility of the connectors.
Knowing the dimensions of the connector and the output voltage of the adapter, you can figure out for yourself whether this power supply is suitable for you or not.
Load protection
May include the following standards:
UVP – Under Voltage Protection – protection against low voltage.
OVP – Over Voltage Protection – protection against exceeding output voltages (required for all ATX12V standard power supplies).
OCP - Over Current Protection - protection against current surges when any of the outputs is overloaded.
OTP - Over Temperature Protection - protection against overheating.
OLP – Over Load Protection – protection against overload based on total power across all channels.
SCP - Short Circuit Protection - short circuit protection.
Not all manufacturers specify this parameter, but it exists.
Selecting an adapter by connection type
There are currently two types of power supplies:
- network, that is, which is connected to a 230 V network.
- automobile ones, which are connected to the vehicle’s on-board electrical network via a standard cigarette lighter connector.
There are also universal models that can be connected to both a 230 V network and a car power supply. Naturally, such models cost a little more. If you often travel by car with a laptop, then pay attention to models with a connection to the on-board network.
Additional features
Some power supplies have a separate USB output for charging various gadgets. This is a fairly convenient option that allows you to reduce the number of different chargers. The laptop, of course, has USB ports, but they are usually not powerful enough to quickly charge modern gadgets.
Conclusion
I hope that this short article will help you in choosing a power supply for your laptop, but if after reading this material you still have doubts about your ability to choose a power adapter yourself, contact service centers or consult store managers. Although I would better advise going to an authorized service center of your laptop manufacturer.
2. The power of your power supply (Watts, W)
3. Connector type
4. The model or marking of the power supply itself is not sufficient for selecting a charger
5. Your laptop model will not be the key to choosing a power supply
6. Quality
Let's take a closer look:
The power supply capacity is indicated either on the sticker of the original power supply marked Output (outgoing characteristics), or on the sticker of the laptop itself marked Input (incoming characteristics). Here we will clarify that the sticker of the power supply itself can immediately indicate the power in Watts (W), or the outgoing voltage in Volts (V) and current in Amperes (A). In the second case, the power can be calculated by multiplying A by V, and at the same time remember Ohm's Law :-). But on our website in the filter you can simply select the voltage and amperage indicators.
The easiest way to determine the type of connector is by its appearance, comparing yours with the one in the photo in the description on the website. You can simply measure a round connector with a ruler to determine its diameter and compare it with the information in the description. We select connectors of other shapes visually. On our website we also offer you to simply select the type of connector in the filters.
What's easy to get wrong?
The model or marking of the power supply itself encodes the outgoing voltage and current characteristics, but does not carry information about the type of connector. And thus, you risk getting a power supply that is not suitable for you at all.
The laptop model should also not be used when searching for a power supply, since there are no general official catalogs from manufacturers and you may receive either unreliable or contradictory information. In addition, some laptop models may use power supplies of different power. In this case, there is a big risk of purchasing a charger that will quickly fail due to the load and you will again be faced with the problem of finding a new one.
In most cases, charging occurs without a power supply cable. This is a cable from a 220V outlet to charging. If everything is fine with your loved one, you can continue to use it. If yours is damaged or lost, you need to purchase a new cable by selecting it from the catalog.
Of course, the best option is to purchase an original charger. Such charges will be significant in cost. But if it is not possible to buy an original power supply, you can choose from the copies offered. You need to keep your eyes open here, because manufacturers and sellers tend to keep things quiet about the quality of charging.
The quality of charging can be determined by cost, total weight, plastic and cable. In this case, you need to remember that a good power supply will be heavy, like your original one, the cable will be more elastic and thick, and the plastic will be dense and hard, not very rough. Also, these signs will help you determine whether the seller is offering you a counterfeit under the guise of an original charger, because it is very easy to make something “original” by sticking a sticker with a brand. And the price of higher quality copies will be higher. There is no point in saving money, since the operation of your laptop and the safety of the motherboard directly depend on charging.
If you think you can easily identify a good power supply, let's check it out.
Here is a photo of a 12V, 8A power supply (note), that is, 96 W. He looks good. The only thing that raises doubts is its weight. It's too light. Overall it looks good.
Let's take a look inside.
Immediately after opening, the following features are striking:
Therefore, it is better to understand that “China is different from China” and make a choice consciously. It is advisable to rely on the reputation of the store. and not rely on who has the lowest price on the market.
We wish you an easy solution to your problems!
If you would like additional material to appear in this article, please write in the comments. Questions will be answered and the article will be updated.
For the most complete understanding of what a “laptop power supply” is, what parameters it has and how to choose a power supply, let’s start in order.
In this article:
- Purpose. What are they, what are they used for.
- Characteristics. What do we have at the exit from the block?
- Compatibility. Which blocks are interchangeable?
Purpose:
Everyone knows that the socket in every apartment has a voltage of 220 V, a frequency of 50 Hz. Naturally, such parameters are not suitable for direct power supply of power circuits and logical circuits of computer equipment, in particular a laptop. To reduce and stabilize voltage and filter noise, power supplies (hereinafter referred to as PSU) are used. Even if you don't have a laptop, you've probably seen one often. In most cases it looks like this:
On one side, a cable comes out of it to the laptop, and on the other, you connect a 220V power cable into it, which can be of 2 types:
Specifically, the power supply example above requires a 3-pin cable. It is worth noting that after a “barbaric” modification of the 2-pin cable (cutting the middle of the connector), it can be connected to a 3-pin power supply, but we strongly do not recommend doing this. It will look "so-so", it will be awkward to insert and sometimes fall out of the power supply. There is no way to use a 3-pin 220V cable to a power supply with a 2-pin, soplease carefully select blocks and cables for them!
Characteristics:
Each power supply has the following main characteristics (as illustrated in the photo below):
Now more about each of them.
1. Input voltage(measured in volts (V, V)).
This is a parameter related to the industrial network (in our country it is 220V). You shouldn’t particularly pay attention to it, since most power supplies are adapted to the standards of different countries and operate in a wide range of voltages. The same situation is in our case (see photo): 100-240V. This is quite enough to work absolutely normally both in the networks of the CIS countries and abroad, where the voltage of the industrial network is 110V. (To find out the standards of sockets in household networks in different countries, see).
2. Output voltage, (measured in volts (V, V)).
This is a more important parameter: the laptop power supply. This figure (in the above example it is 20V) shows what voltage the power supply produces and will be supplied to the input of the power circuits of your laptop. It is very important that this figure is not significantly larger than the one printed on the nameplate on the bottom cover of your laptop. The photo below shows a laptop nameplate whose supply voltage is 19V.
The fact is that for the normal operation of your laptop, it is desirable that the power supply produces exactly the voltage that is indicated on your laptop. If it is slightly lower, some failures are possible (especially if there are changes in the ratings of the power circuit elements due to the aging factor). If there is a sharp voltage mismatch, the laptop will not turn on, as the overvoltage limit on the laptop’s motherboard will be triggered.
Connect power supplies, power supply output voltage much higher
indicated on the laptop (for example, 30 or more volts) strongly not recommended! Overvoltage protection will most likely prevent you from causing damage to the board, but there is always a risk that there is a manufacturing defect or the breakdown voltage of the protection elements will be lower than the applied voltage, which will result in unacceptably high voltage reaching the controllers and keys and the laptop motherboard will fail .
3. Output current(measured in amperes (A) or milliamps (mA, mA)).
This power supply parameter shows what maximum current the power supply can produce at the specified voltage. On some power supplies it is sometimes not given, but only the output power is written in watts. In this case, the current is calculated using the well-known (I hope :)) formula:
I=P/U, where I is current (A), P is power (W), U is voltage (V).
This parameter is less critical for the laptop, but more important for the power supply. If the current supplied by the power supply will be less than the current indicated on the laptop(or calculated by formula), then in this case the block will burn out . Therefore, you need to choose a power supply that is at least equal in current/power to the parameters specified on the laptop.
How to choose the right power supply for a laptop, tablet, camera, printer, scanner, router, router, monitor, DVD player, game console, and... any other device.
Three simple steps that will lead you to the right choice:
- 1. Determine the voltage (V, volts) that is required for your device
This information can be viewed on the device itself (on the label on the bottom side) - this is the input voltage, for example INPUT: 20V
Also, such information should be displayed on the old power supply - this is the output voltage, for example OUTPUT: 20V
What should you do if your device indicates a voltage (V, volts) that does not match the voltage of commercially available power supplies?
In this case, you can select a power supply with a voltage close to the required value, taking into account the permissible error of ±0.5V.
- 2. Determine the current (A, ampere) that is required for your device
This information can also be viewed either on the device itself or on the old power supply, respectively INPUT: 2A or OUTPUT: 2A
Note: It should be noted that you can buy a new power supply with more amperes than the device needs. In our example, this could be 2 or more amperes (2.5A or 3A, etc.). In this case, the device will take as much energy as is necessary for operation, and the power supply, having an additional power reserve, will heat up less and last longer.
- 3. Determine the connector (connector) that fits your device
There are different types of connectors, but they can be easily identified by name or size. Take a ruler and measure the dimensions of the plug, or the socket on the device itself (where the connector is inserted). In the vast majority of cases, it is enough to determine the outer and inner diameter of the connector. For example, the connector shown in the figure is 5.5 mm. in outer diameter and 2.5 mm. in internal diameter, which corresponds to the connector type: 5.5 x 2.5 mm.
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What should you do if your device has a socket that does not fit connectors from commercially available power supplies?
In this case, you can purchase a power supply that is suitable for voltage (V) and current (A), and install a cable with a connector from the old power supply. This operation can be performed independently or at any repair center.
Note: As a rule, most devices require constant voltage with the polarity of the connector supply: positive ("+") on the inner contact and minus ("-") on the outer contact.
Guided by these rules, let's, for example, select a power supply for a device that has voltage and current: 20V-2A, with connector 5.5 x 2.5 mm.
Option 1: Power supply PA3743U-1ACA (20V-2A), link to product page:
Option 2: Power supply 76G01B651-5A (20V-3.25A), link to product page:
Option 3: PA-12 power supply (19.5V-3.34A) when replacing the cable with connector from the old power supply, link:
That's all! Now you can easily select a power supply for any of your devices!
And also... you can find a suitable power supply for your device by typing a search query in the search area at the top of any page our site and click on the search button or the Enter key. The search criterion can be the model of the device or power supply. For example, the model " IdeaPad S10" or " 41R4441".
Please note that the list of compatible models may not be complete because device manufacturers are constantly releasing new models that will accept existing power adapters. We try to add new device models to the compatibility lists, but if you have difficulty selecting a power supply for your device, write us a message in the form " Ask a Question "(located below). Our experienced salespeople will help you make a choice.