Q:HP Compaq V3000 adapter is the number of V

Hp also seen 18.5v. 18.5v can also be used

Q:Is the power adapter powered up or powered by a laptop? Why is this used? The Is the laptop adapter in the absence of computer power is not?

This is the problem, the power adapter is to power the laptop, there is no power adapter, the computer can not open the machine, of course, the laptop has a battery, but it also needs to rely on the power adapter to charge, the battery will use the longest time 4 hours. If there is no power adapter, this computer is a display. The power adapter is always energized (it also acts as a regulator to protect the computer)

Q:What is the order in which the power adapter is connected when the notebook is powered on?

The adapter should be energized, let it work, and then turn on the computer.

Q:Laptop power adapter water

Try not to try, an adapter is 100 dollars or so, do not accompany the computer!

Q:What is the precision of a laptop power supply charger? What are the requirements for European imports for its accuracy?

China is 220W, most of Europe is 220 ~ 230W. So the European electrical appliances into the Chinese market is not a big problem.

Q:Can the laptop's power adapter be placed in a suitcase when flying?

Power adapter can be checked or carry luggage with the laptop, laptop battery can be checked to carry the baggage.

Q:Laptop power adapter, the original 19v 3.95A can be replaced by 19V 3.42A it?

According to experience: 19 * 3.95 = 75W 19 * 3.42 = 65W The output voltage of these two adapters, so the computer light load (that is, the power consumption of the computer is not too large) is the case can be universal. The difference is that they can provide the maximum power is not the same, a maximum output to 3.95A current, one can output to 3.42A. In fact, 3.95A, 3.42A, are its nominal current, in fact, their Tolerance is 20% to 20% will be top of their OCP (overcurrent) protection. In other words, 3.95A may output to 3.95 * (1 + 20%) A, 3.42A the same. But in the case of heavy load, 65W may be the first to the top of the protection point, which occurred protection. Similarly, 65W heat is also higher. There are many protective mechanisms for the notebook, so there is no important work that can be generic. Motherboard itself has over-temperature protection, over-current protection, automatic frequency protection. The adapter itself also has overcurrent protection, over temperature protection, low voltage protection. In summary, can be common. However, it is best to use the battery together. If the supply of 65W is insufficient, there will not be a forced power off. In case of underfill, you will see that the charging lights on your computer are flashing, and you can unplug the adapter, re-insert it, and use it. Rated current is not enough, if the latter quality is good, it is estimated that can be used, but the fever is high and easy to damage, temporary emergency can, but long-term use or recommended current equal to or greater than the original current adapter as well.

Q:Dell laptop power adapter can be used but can not be charged

Hello, the power adapter if the current is detected to be unstable, is absolutely not allowed to charge, the computer is detected after the estimated is to protect the battery, so do not charge, can only use AC power. Power adapter 220v AC power supply, through the square box, that is, transformers, stable to your computer's rated voltage and current, the computer can be used normally It is recommended to buy a bar, because if the adapter is broken, the current intensity is too high, will breakdown or burn the motherboard a lot of capacitors, if the computer to change the motherboard, then the big trouble

Q:My books recently always suddenly automatically shut down, and then the power adapter lights do not shine, can not use the power adapter to restart the laptop after the laptop can still use the computer to work properly, originally thought the socket is not good, but later found not the socket Problem, the power adapter to wait for several hours after the light was able to work properly, is not the power adapter is broken (⊙ o ⊙) ah?

Usually the power adapter is faulty, it is best to re-purchase one; There are two main indicators of the adapter, namely: voltage and current, and the voltage and current for each notebook is not the same, the configuration or purchase must pay attention; In the notebook's manual or "specification range" or "electrical parameters", generally indicate the basic parameters of the adapter, the most important of which is the voltage and current, if there is no original adapter, you need to find alternatives, we must choose: 1, the new adapter of the voltage and the original exactly the same; 2, the current should be slightly larger than the original maximum output current (20 ~ 30%); 3, the positive and negative polarity of the adapter plug must be the same as the polarity of the socket (ie, the original adapter) 4, the hole diameter of the plug must be the same as the diameter of the socket (ie, the original adapter) (the plug has a large hole and hole points).

Q:My ASUS notebook power adapter is 19V ~ 4.75A can use other computer adapter 19V ~ 3.42A charger

Is possible, but it is best not to use long, you can buy Taobao, not expensive