The power adapter brands are Hangjia, Quanhan, Kang Shu Technology, Delta and Flextronics.

1. Hangjia

Shenzhen Hangjia Chiyuan Electric Co., Ltd. is a well-known brand of chassis, a well-known brand of desktop power supply, a famous trademark in Guangdong Province, an outstanding private enterprise in Shenzhen, the vice chairman of China Power Supply Society, and one of the largest supporting production bases of PC power supply and household appliances in mainland China.

2. Quanhan

Quanhan Enterprise Co., Ltd., a well-known desktop power supply brand, was founded in Taiwan Province, an influential PC power supply provider, and the fifth largest leading manufacturer of power supplies in the world.

3. Kang Shu Science and Technology

Kang Shu Science and Technology is a leading manufacturer in the global power supply industry with power management technology as its core, with its global R&D headquarters in Taiwan Province and professional R&D teams in Chinese mainland, the United States and Malaysia, covering the fields of information, communication, consumer electronics, network and industry.

4. Delta

Zhongda Dentsu Co., Ltd., a well-known brand of desktop power supply, started in 1971. It is a world leader in switching power supply products, a well-known enterprise in the global power electronics industry, and one of the larger manufacturers of global DC regulated power supply.

5. Flextronics

Flextronics Singapore, a fortune 5 company, was established in 1981 and is a world-class electronic manufacturing service provider dedicated to providing innovative design and manufacturing services for automobile, national defense industrial manufacturing, medical and technological enterprises.

the above contents refer to: Baidu Encyclopedia-Hangjia, Baidu Encyclopedia-Quanhan.