Choose a right AC Adapter for your Laptop

Nowadays, the laptop is more and more popular, many people buy laptop. However, no matter the users or sales-man, the most talk about is the laptop’s CPU, Chipset, WIFI and the new technology, less people will notice the AC Adapter. In fact, to the Laptop AC Adapter, we must pay more attention, because the ac adapter is the laptop’s power source.

Today, we will talk about the Knowledge about Laptop AC Adapter

1. Working principle

As the home use power is about 100V – 240V (AC), and the power on the car or plane is about 12V (DC), but these three common power is not stable, but the laptop need constant voltage DC of stable power, so it can not directly charge the notebook computer, otherwize it will damage the notebook computer.

So, simple put, the work of the AC Adapter is make the unstable power supply into a laptop computer needs constant voltage DC through the principle of switching power supply, charge and supply power to the laptop.

But It is noteworthy that this transformation circuit, there must be protection circuit (include Overcurrent protection circuit, Over-voltage protection circuit, Short-circuit protection and so on.), Prevent accidents, protect the notebook computers from being burned.

2. Choose good brand

Now many small factory’s fake and shoddy products are Unqualified, Normal use should be no problem, once the unexpected will burn your laptop. Save tens of dollars but burn your thousand dollars laptop, it is not worth, these products often cut corners, such as its actual voltage and current has only 19V / 3.42A, but mark 19V / 4.74A, this will cause charge slower, or even damage your laptop battery and laptop.

So it is suggested to buy ac adapter to professional factory’s products, such as www.batteries-world.co.uk,  www.laptopbatteryinc.com, www.battery-chargers.org, these three shops all sell high quality laptop battery and laptop ac adapter.

3. Distinguish using purposes

If you need office work or home use, you can purchase a home use (AC), if you need use in the car, you can purchase a cau use (DC), if you need use in the plane, you add a plane plug on the basis of car. If you need a taking into account these three, you can buy a three in one ac adapter, if you do not want your laptop bag add weight, you can buy two ac adapters, on in the office and one at home, this will very convenient and can give other people use.

4. Clear voltage, current and connector

Look at your original ac adapter, remember the voltage (V) and current (A), they are often marken after “output”, you should also clear the connector, look it is circle or spuare.

If your original ac adapter’s voltage and current is 18.5V / 3.5A , that means the ac adapter you wan to buy its voltage must 18.5V or higher (not much higher), and the current must 3.5A (the higher the better, but the higher the expensiver).