Founded as a direct source manufacturer in China, Merryking has evolved into a trusted partner for global B2B buyers seeking stable, certification-ready power solutions.
With 200+ employees and scalable production capacity, we deliver consistent quality across batch orders while maintaining competitive wholesale pricing structures.
Our expertise spans multiple industries, serving clients across 70+ countries with reliable OEM/ODM solutions tailored to market-specific compliance requirements.
Automated SMT Production Line
Strict Quality Control Process
Advanced Assembly Workshop
Professional Team Collaboration
5,000㎡ Manufacturing Facility
Dedicated R&D Engineering Team
Automated SMT Production Line
Strict Quality Control Process
Advanced Assembly Workshop
Professional Team Collaboration
5,000㎡ Manufacturing Facility
Dedicated R&D Engineering Team
We believe long-term cooperation is built on batch consistency and reliable lead time.
Our manufacturing processes are engineered to deliver identical specifications across production runs, ensuring your products maintain the same performance standards from first batch to thousandth batch. This consistency eliminates costly quality variations that disrupt supply chains and damage brand reputation.
Certifications are not decoration — they are market access tools.
We maintain comprehensive certification portfolios including CE, FCC, UL, PSE, and more, understanding that regulatory compliance is the gateway to global markets. Our certification-ready approach means faster time-to-market for your products, with documentation and testing protocols already aligned to regional standards.
We grow together with clients, not just fulfill transactions.
Our success is measured by your growth. We invest in understanding your business objectives, market challenges, and future roadmap to provide proactive solutions rather than reactive responses. This partnership approach has resulted in multi-year relationships with clients who view us as an extension of their supply chain team.
Supplying B2B Clients Across Mature & Emerging Markets
UL, FCC certified solutions for demanding industrial and medical applications with strict compliance requirements
CE, RoHS compliant power adapters serving established distribution networks across the European market
PSE, CCC certified products for both mature and emerging technology markets throughout the Asia-Pacific region
Multi-certification solutions supporting diverse market requirements in Latin America, Middle East, and Africa
Complete vertical integration eliminates dependency on external suppliers, ensuring consistent lead times and quality control throughout production cycles. Our automated SMT lines handle component placement with precision positioning accuracy of ±0.02mm, supporting both high-volume runs and flexible batch sizes. This in-house capability allows rapid design iterations and faster time-to-market for custom OEM projects.
Systematic workflow management from component receipt to final packaging maintains traceability and reduces batch variation across large-volume orders. Our MES (Manufacturing Execution System) tracks every unit through assembly, testing, and packaging stages with barcode identification. Real-time monitoring enables immediate response to process deviations, maintaining consistent output quality across multi-month production schedules.
Comprehensive IQC protocols verify component specifications before production begins, preventing quality issues that compound during assembly processes. Every incoming batch undergoes electrical testing, dimensional verification, and compliance documentation review. Critical components like transformers and capacitors receive 100% inspection with automated test equipment, ensuring only specification-compliant materials enter our production inventory.
Predictable delivery schedules support inventory planning and sales commitments, critical for distributors managing JIT supply chain requirements. Our production planning system maintains buffer inventory for standard models and coordinates component procurement with production schedules for custom orders. Average lead times of 15-20 days for existing tooling and 30-35 days for new designs enable reliable launch planning and replenishment cycles.
Meeting global B2B partners face-to-face across major international trade shows.
Stability is not promised. It is engineered.
Incoming Material Inspection
All critical components verified before entering production.
PCB Assembly Monitoring
Strict parameter monitoring during PCB assembly.
In-Process Inspection
Quality checks at every production stage.
Full-Load Burn-In
Every unit undergoes full-load burn-in test.
Final Inspection
Final sampling before shipment.
Production Tracking
Every adapter can be traced back to its production batch.
Merryking was established as a power adapter manufacturer in Guangdong, China, with a vision to deliver quality power solutions to global markets.
Achieved first international certifications CE and FCC, marking our entry into European and North American markets with compliance-ready products.
Expanded global footprint across 30+ countries, establishing partnerships with distributors in Europe, North America, and Asia-Pacific regions.
Invested in automated SMT lines and expanded manufacturing floor space to 5,000 square meters, tripling production capacity.
Added UL, PSE, and CCC certifications, enabling product applications in industrial, medical, and high-reliability sectors.
Launched dedicated R&D facility with 15+ engineers, focusing on custom OEM/ODM solutions and next-generation power technologies.
Grew workforce to 200+ employees with specialized teams in engineering, quality control, and international sales operations.
Achieved ISO 9001:2015 quality management certification, formalizing systematic quality processes across all operations.
Launched independent B2B website and digital customer engagement platform, enhancing global accessibility and service efficiency.
Serving 70+ countries with 5,000+ completed projects, recognized as a trusted OEM/ODM partner by international brands and distributors.
Merryking delivers stable and compliance-ready power solutions for global markets, combining manufacturing expertise with certification knowledge that accelerates market entry for B2B clients.
Their batch consistency and predictable lead times have made them a preferred supplier for distributors requiring reliable OEM partnerships across multiple product categories and certification requirements.
As a direct source factory with vertical integration, Merryking offers the quality control typically associated with tier-one manufacturers while maintaining the flexibility valued in wholesale partnerships.
A801, No.1 Tianyang 2nd Road
Dongfang Community, Songgang Street
Bao'an District, Shenzhen
Guangdong, China