Laptop Adapter 40 Watt 19V 2.1A

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200 Pieces pc
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100000 Pieces per Month pc/month

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Product Description:

*Over-current protection,

*Voltage protection,

*Short circuit protection,

*Hot seller,Price advantage.

*Input :100-240V 50-60Hz 1.5A


*DC interface:2.5*0.8



Products Features:

1.Professional patch technology production;

2.Allmported electronic components, circuit boards with over-voltage, over current, short circuit protection;

3.Output power enough;

4.The output voltage accuracy;

5.The output voltage ripple is small;

6.Original standard design, 100% compatible with original power supply.

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Q:BenQ notebook power adapter on the green light flashes, even the power is what is the problem?
Hello, if your product fails, it is recommended that you can contact the BenQ authorized service network, by a professional engineer for your detection processing, service network information, please see: BenQ China - Service Support - Information Inquiry - Service Network - Select Specific product type, where the province, where the city, click on the query can be.
Q:The laptop will automatically turn off the power adapter when the workload is large
the output current of some similar interface power adapter!
Q:What are the advantages and disadvantages of using laptop adapters for led lighting? Is power saving?
You use the laptop adapter to drive LED lighting is not very good, because the LED lamps are driven by constant current source (subject to LED light source characteristics of the restrictions, check the diode characteristics), and your notebook adapter is a constant voltage source, with LED lights The temperature rise, the adapter output current also followed to increase, resulting in LED lights light failure, shorten the service life.
Q:Does the laptop's power adapter work when it's creaky, normal?
As the notebook adapter is used in switching power supply, While the switching power supply load changes little, Work oscillation frequency in the human hearing threshold slightly higher! Although it is also ringing, But you will never hear! When using the adapter as the main power supply, It in addition to the books themselves to provide the necessary current, But also the use of gaps for the rechargeable battery charge! But the books due to different work procedures, Current changes from time to time big or small! Adapter response time slower than the books, It has to change the oscillation frequency from time to time to adjust the output current size! But when the oscillation frequency becomes low, Your ears "listen" see it's shaking the hum! Coupled with switching power supply core with energy, Core must have a gap, So vibration frequency will produce magnetic resonance! This is sometimes the reason why the sound of the adapter is heard when the big time! All the use of FM switching power supply equipment, Will appear this situation! Such as color TV, Di Weida machine, induction cooker, etc.! Be assured with it! As long as the adapter does not smoke, can work properly, There is no problem with high temperature and hum! The The
Q:HP computer power adapter suddenly can not be used
Buy the adapter recommended the choice of formal after-sales outlets, although the price is more expensive, but to ensure that the adapter is genuine, Taobao and computer city now a lot of fake, not recommended to buy. In addition: you can also choose a third party compatible adapter, such as sailing, product wins.
Q:ASUS notebook computer power adapter lights do not light, the computer is not charged!
May be the power adapter is broken, take this power adapter to the computer shop to buy a new on the line. In addition, the meaning of the triangular line refers to the three-pin plug, in fact, the computer adapter plugs are both three feet inserted, but also feet inserted, both will not cause leakage.
Q:I have an external monitor with a watertop unplugged the power adapter
VGA cable is easy to be disturbed, it is recommended that the adapter and the VGA line away a little. Or you have other interfaces, then use DVI or HDMI. Do not change your power adapter
Q:Sony laptop power adapter there are several
Original factory Non-original If you want to use as long as the voltage and current can be met. But the quality of the original better, more comprehensive protection, I used to use the computer before the thunder, was mine split, the result is only burned the adapter - the original. I have been thinking if the original will not be destroyed by the computer.
Q:19V 3.42A notebook can use 20V 4.5A power adapter?
It is best not to use, the voltage is too large easy to burn the power, damage to the notebook, it is recommended to use the same voltage. The way to tell you a little power knowledge, to prevent deceived: << usually imitation of the 20-50 dollars, renovation of the original 60-150, the real original in the 150-200 between the general, and the national security >> Need a laptop power adapter friends can go to my store to see, there are Genius original brand adapter, with the original original quality of the original, compared with the replica with the refurbished much stronger, and the price is cheap. Click on my name - login my image on the website - into my Taobao shop, you can view the details, we want to help.
Q:Laptop connected to the power adapter, always a power will not power. Install the battery does not turn on the power adapter can be normal boot.
This thing you use the multimeter unrealistic, the interface loose, poor battery contact, the motherboard failure is possible, you'd better get the computer city so that the master like a face experiment to show you, I most hope that the adapter has a problem, The
Our products have passed a series of certifications, such as CE, FCC and RoHS. We integrates development, design, production, processing and wholesale. Based on scientific attitude and precise processing, we produce every unit of reliable quality. With high quality products & a good reputation, we have got the favor of customers.

1. Manufacturer Overview

Location Guangdong,China (Mainland)
Year Established 2009
Annual Output Value US$10 Million - US$50 Million
Main Markets North America; South America; Eastern Europe; Southeast Asia; Africa; Mid East; Eastern Asia; Western Europe
Company Certifications ISO 9001:2000

2. Manufacturer Certificates

a) Certification Name  
Validity Period  

3. Manufacturer Capability

a)Trade Capacity  
Nearest Port
Export Percentage 71% - 80%
No.of Employees in Trade Department
Language Spoken:
b)Factory Information  
Factory Size: 3,000-5,000 square meters
No. of Production Lines 10
Contract Manufacturing OEM Service Offered
Product Price Range