Technical Articles

What is a Class 2 Charger

The Basics of a Class 2 Charger

A Class 2 charger is a type of electric charger commonly used for charging small electronic devices such as smartphones, tablets, and portable music players. It is designed with safety features to prevent overcharging and protect the device being charged. A Class 2 charger is also known as a low power charger because it provides a maximum power output of 5 watts.

Class 2 chargers are typically compact in size and lightweight, making them convenient for travel and everyday use. They are often equipped with a USB port, allowing users to connect their devices using a USB cable. Additionally, Class 2 chargers can be powered by AC outlets or even through USB ports in computers or car chargers.

The Importance of Safety

One of the key features of Class 2 chargers is their built-in safety mechanism. These chargers are designed to deliver a safe and steady charge without overheating or damaging the device. They have various safeguards in place, such as overcurrent protection, short circuit prevention, and temperature control.

Overcharging is a common concern when it comes to charging electronic devices. Class 2 chargers are engineered to prevent overcharging by automatically ceasing the charging process once the battery reaches its full capacity. This feature not only protects the device but also helps to prolong the battery life.

Compatibility and Limitations

Class 2 chargers are suitable for a wide range of small electronic devices, including smartphones, tablets, e-readers, Bluetooth speakers, and more. However, it is important to note that they may not support fast charging for certain high-power devices.

While Class 2 chargers are generally efficient for low-power devices, they may not provide the fastest charging speed. If you are charging a device that requires a higher power output, such as a laptop or a gaming console, it is recommended to use a charger specifically designed for such devices.


In summary, a Class 2 charger is a low-power charger commonly used for small electronic devices. It provides a safe and steady charge while protecting the device from overcharging. Although it may not support fast charging for high-power devices, it is an excellent choice for smartphones, tablets, and other low-power electronic gadgets.


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