Sinrace Power Supply Technology (Shenzhen) Co., Ltd.

AC Power Adapter can provide continuous power to your laptop/notebook computer and charge the laptop battery from AC power source such as electrical plugs on the wall.

Before purchasing this item, please read carefully your laptop user manual to ensure the tech specs are compatible with your laptop.This AC adapter is suitable to laptop, featuring with many protection functions, such as overload protection, output short circuit protection. Its compact and lightweight design make it convenient to provide portable power source for using at office or home. 120W design enables optimum system performance.

To find out the voltage & current, turn your laptop over and look for a label, sticker or writing which shows the voltage and current, it should look something like the examples below. The voltage figure will have a "V" after the number i.e 19V.5 and the current will have a "A" or "mA". i.e 3.15A, 950mA. You can also find these shown in a similar fashion on the original if you have it. In the examples below the voltage & current has been marked with a red ring.

The voltage of an AC power source can be easily changed by means of a power transformer. This allows the voltage to be stepped up (increased) for transmission and distribution. High-voltage transmission is more efficient than low-voltage transmission over long distances, because the loss caused by conductor resistance decreases as the voltage increases.

The voltage of an AC power source changes from instant to instant in time. The effective voltage of an AC utility power source is usually considered to be the DC voltage that would produce the same power dissipation as heat assuming a pure resistance. The effective voltage for a sine wave is not the same as the peak voltage. To obtain effective voltage from peak voltage, multiply by 0.707. To obtain peak voltage from effective voltage, multiply by 1.414.

Keep in mind that improperly setting an AC adapter may damage your equipment, and some devices should only be used with an adapter specifically designed for them. Be sure to consult the device's instruction manual before using any non-standard adapter.