AC or DC adapter is also known as AC charger or converter. Basically, it is an external power supply used to charge batteries. Thus, it is used with the machines or devices that run on batteries like laptops, phones, etc. These devices do not have any other power source and runs purely on the battery.
How do AC adaptors work?
This adaptor is made of a central unit; it draws power from an AC outlet. After taking the power from the AC outlet, it converts the received power to DC, which is used by the device like computer and phone. Other devices that are attached to the computer via cord also get charged using the same method.
Now when it comes to power rating, then every AC adapter has a specific rating that is measured in watts or volts, it is the amount that can be handled by the charger.
The AC adaptors could not be used in any device and it is not universal, the reason for the same is, different power rating and the kind of plug attached to the adaptor at the end.
If it is vital to use an adaptor with other devices, the universal AC adapter need to be used, this adaptor is exclusively designed to work with a number of devices. These adaptors, used to have different types of plug attachment at its end to get connected to the devices. The universal AC adapter also posses wattage or voltage range that it can output, the range includes 70 watts to 125 watts and 100 volts to 240 volts. This provides a greater range of device compatibility.
To know more about the AC adaptors, one can contact the dealers of Singapore, they possess a good knowledge of the subject.