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Brand Model: (The power supply model may not be exactly the same, as long as the output and socket are matched, it can be used)
Input parameters: 100~240V（Used globally）
Output parameters: 19.5v2.3a
Interface standard: 4.5*3.0
Applicable models: Dell/DELL notebook tablet XPS power bankPW7015M 12000mAh mobile power bank
If you don’t know whether your machine can use this adapter, you can check the output parameters of your original adapter（Voltage, current）If the original adapter is lost, you can check the parameters on the bottom of the computer or the manual of your machine.
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Mode of transportation:
Our shop in mainland China: default ZTO Express. Support Yuantong/Shentong/Yunda/SF.（Additional charge）
Taiwan. Hong Kong. Macau: SF Express is the default.
Taiwan. Hong Kong. Macao: the default SF Express.
Overseas regions: contact us
Overseas: Contact Us
Tips:
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1. If the items in this shop have quality problems or defects, we will agree to return or exchange them. The buyer must return the item before it can be exchanged. We will return the item after confirming the item. If the item provided to you does not meet the product description, we will refund you or exchange it. All replacement items cannot be damaged by human beings, so do not disassemble and repair them without authorization, otherwise they cannot be replaced or refunded.
2. The products in this store will be shipped according to customer requirements. The product description does not indicate brand new products. If you need brand new products, please contact the owner to arrange to ensure accurate delivery.
3. Before signing for express delivery, you should open the package to check whether the items are squeezed or cracked. If there are any signs of squeezing or cracking, please do not sign for receipt, otherwise the buyer will be required to bear the relevant responsibilities.
4. After receiving the goods, if you have any questions, please contact us in time, and we will answer and deal with it according to the actual situation.
5. This shop can issue receipts or invoices, free of charge.
Power adapter instructions:
User notice:
1. Power adapter（Hereinafter referred to as power supply）What does the nominal voltage and current mean?
First of all, the nominal voltage of a general power supply refers to the open-circuit output voltage, that is, the voltage when no load is connected to the outside and there is no current output.
So it can also be understood that this voltage is the upper limit of the output voltage of the power supply.
In the case of an active voltage regulator component used in the power supply, even if the mains voltage fluctuates, its output is a constant value.
Like a small transformer on the market, such as a power supply such as a walkman, if the power supply fluctuates, the output of the power supply will also fluctuate.
Generally speaking, the true no-load voltage of an ordinary power adapter may not be exactly the same as the nominal voltage, because the characteristics of electronic components cannot be exactly the same.
Therefore, there is a certain error. The smaller the error, the higher the requirement for the consistency of electronic components, and the higher the production cost, so the price is more expensive.
In addition, regarding the nominal current value, no matter any power supply has a certain internal resistance, when the power supply outputs current, it will generate a voltage drop inside.
It causes two things, one is to generate heat, so the power supply will be hot, and the other is to cause the output voltage to drop, which is equivalent to internal consumption.
2. They are all power supplies with the same nominal voltage and different output currents. Can they be used on the same laptop?
The power supply voltage is the same, the output current is different, can it be used on the same laptop?
The basic principle is that a power supply with a large nominal current can replace a power supply with a small nominal current. I guess someone would think so,
I think a power supply with a large nominal current will burn the books because the current is too large. In fact, the current depends on the load when the voltage is the same.
Hehe, just think about physics in junior high school.
When the notebook is running at a high load, the current is larger, and when the notebook enters the standby mode, the current is smaller, and the power supply with a large nominal current has sufficient current margin.
On the contrary, some people use a 56w power supply instead of a 72w power supply without any problem. The reason is that the design of the power adapter usually leaves a certain margin.
, The load power is less than the power supply, so this kind of replacement is feasible in general use, but the remaining power supply margin is very small.
Once your notebook is connected to many peripherals, such as two USB hard drives, then the cpu runs at full speed, and there is a base on which an optical drive reads the disk at full speed.
Coupled with charging the battery at the same time, it is estimated to be dangerous. You should feel at any time whether your power supply can already boil eggs.
Therefore, it is best not to replace the high-current power supply with a small-current power supply.
3. It is exactly the same machine, and the power supply of others is warm, mine is always very hot, why?
Don’t suspect that there is a problem with your power supply. First, take a look at what your notebooks are doing, whether it’s the two USB hard drives mentioned above and the CPU running at full speed.
The hard disk reads and writes crazy, the optical drive reads the disk at full speed, while charging the battery, loud music is played, the screen is at the highest brightness, the wireless network card is always detecting signals, etc.
It is very important to make good use of power management and adjust the working status of the books according to the tasks.
Fourth, the nominal voltage of the power supply is much higher than the voltage of my notebook battery. There will be no accidents, right?
First of all, it should be understood that the power supply to the notebook is different from the battery to power the notebook.
Powered by the battery, the output of the battery is pure DC, which is very clean. The voltage of the battery is neither possible nor need to be designed to be very high.
The chemical characteristics of lithium batteries determine that the output voltage of a battery cell can only be around 3.6V, so many batteries use a three-stage series connection.
10.8V has become a very popular battery voltage. The nominal value of some batteries is slightly larger than an integer multiple of 3.6V, such as 3.7V or 11.2V, etc.
In fact, it is to protect the battery.
Power supply, the situation is more complicated. First, the added voltage needs to be further stabilized and filtered to ensure stable operation in the case of poor power performance.
The regulated voltage is divided into two parts. One way supplies power to the notebook, and the other way charges the battery. The part that supplies power to the notebook is the same as when the battery is powered.
The part that charges the battery can only be added to the battery cell through the battery charging control circuit. The control circuit can be very complicated.
Therefore, the power supply voltage must be greater than the cell voltage to have sufficient capacity to supply each unit of the charging control circuit.
Finally, the voltage actually added to the battery cell will never be the nominal voltage of your power supply. Don''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''t worry.
In addition, I searched a bit. Let’s take a look at what the battery charge control circuit includes. It should include primary voltage regulator,
Precision tunable voltage stabilization, thyristor adjustable pulsating output, voltage stabilization output, current feedback, chip charging process recording and calculation,
The charging program self-feedback adjusts the parameters, etc., hehe, do you still need to consume a part of the electric energy?
Five, the maintenance and maintenance of the daily use of the power adapter
Power Adapter
Do not squeeze the power adapter cable and cause the outer insulating sleeve of the power cable to break
Do not allow the power cord to bear long-term load and cause damage to the power cord
Prevent drops and impacts
After the computer is turned off and not in use, disconnect the power adapter from the socket
Be careful not to plug the power cord port into other ports
Insert and unplug the wiring horizontally to prevent the port from loosening
contact details: Want Want: Energy Bull Battery
