Your first choice for reliable and high-quality Power Solutions tailored to meet diverse industry needs.

Longjann Tech Co., Ltd. is a professional manufacturer specializing in the production of switching power supplies, power adapters, AC adapters, battery chargers, high/low frequency transformers, and related products since 2004. Our products are widely used in various applications, including portable consumer electronics, IT communication equipment, digital devices, and power-driven tools.

Certifications and Quality

We hold numerous safety certifications, including UL, CUL, TUV, GS, CE, CB, SAA, PSE, and CCC. Our sophisticated factory management system and excellent customer service ensure that our products receive favorable reviews from clients worldwide.

Research and Development

Our strong R&D team has extensive experience in the field of switching power adapters. Our product range includes battery chargers, AC adapters, LED drivers, and more. We welcome OEM orders and provide a 2 years warranty on all products. Additionally, we offer comprehensive after-sales service to our wholesale clients.

Our Mission

Our goal is to expand cooperation for mutual benefit and achieve win-win progress with our customers. We adhere to the guiding principle of customer satisfaction and strive to meet the ever-growing market demands. We are committed to providing prompt service, reasonable prices, high quality, and innovation.

Global Reach

Our products sell well in North America, Europe, Japan, the Middle East, and Asia. We have earned a high reputation for stable quality, competitive prices, and top-class service.

Thank you for your interest in Longjann Tech. We look forward to partnering with potential business partners and developing together. We believe we are the best supplier for your needs.

Switching Power Supplies
Battery Chargers
Industrial Power Supplies
Power Adapters
LED Drivers
Medical Power Supplies
AC Adapters
DC-DC Converters
Uninterruptible Power Supplies (UPS)

Warmly Welcome To Visit LongjannTech Factory Anytime

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Why Choose LongjannTech as Your First Supplier?


With more than 1000 power supply projects under our belt, we excel at delivering customized, high-efficiency power solutions that ensure reliability and performance.


With over 20 years of expertise, our power supply company is renowned for pioneering reliable and innovative power solutions, solidifying our status as a trusted leader in the industry.


Boasting a team of over 30 skilled engineers, our power supply company is dedicated to pushing the boundaries of innovation and efficiency in power solution development.


Our power supplies have been successfully delivered to more than 50 countries around the globe, showcasing our global reach and trust in our advanced power solution technologies.

Contact LongjannTech Start Power Solution Cooperation

    CEO Note

    “At Longjann Tech, our focus is on delivering top-tier power supply solutions, characterized by innovation and reliability. We are committed to driving progress in energy efficiency and sustainability, harnessing advanced technology to meet the dynamic needs of our clients.

    Our expert team is dedicated to providing efficient, cost-effective solutions that not only power your business but also contribute to a more sustainable future.”

    4.9/5 - (38 votes)