Explore Merryking's Dual Manufacturing Bases in Shenzhen & Dongguan
From SMT to final testing — full in-house production
Watch Production ProcessMerryking Factory Overview
Two production bases across Shenzhen and Dongguan — purpose-built for high-volume OEM/ODM orders, from prototype to mass production.
Factory Exterior
Modern multi-building facility across two cities — purpose-built for high-volume power adapter manufacturing.
Production Workshop
Full SMT and assembly lines operating under strict environmental controls to ensure consistent output quality.
Finished Goods Warehouse
Barcode-tracked inventory management enables fast order fulfillment and precise shipment accuracy at scale.
R&D & Engineering Office
Dedicated engineering teams drive product customization, compliance review, and new model development for OEM/ODM clients.
Merryking Production Process
SMT Production Line
SMT Production Line
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Micron-Level Placement AccuracyHigh-speed SMT lines deliver consistent board output at the micron level — every unit produced to the same standard, run after run.
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Automated Component PlacementFull automation eliminates hand-process variability, keeping defect rates stable even as order volumes scale.
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Inline AOI Optical InspectionAutomated Optical Inspection catches solder defects after every reflow pass — problems fixed in the process, not found at final QC.
Assembly Line
Assembly Line
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Experienced Line TechniciansSkilled workers with 5+ years of line experience handle the critical hand-assembly stages that automation alone cannot replicate.
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Standardized Work InstructionsStation-by-station checklists enforce the same quality baseline across every unit — whether you order 500 or 500,000.
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Full Unit TraceabilityTraceability codes applied at assembly allow any unit to be audited across its entire production and logistics history.
Aging Test
Aging Test
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100% Unit Burn-In Before ShipmentEvery unit undergoes full-load aging — no sampling, no exceptions. Field failures stay in our factory, not in your product.
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Real-Condition Stress TestingExtended cycles under real operating conditions surface early-life component failures before any unit leaves the line.
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Batch Test Data LoggingAging results are recorded per batch and available on request — useful for customer audits, compliance reports, and incoming inspections.
Packaging & Shipment
Packaging & Shipment
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Export-Ready PackagingDrop-test compliant cartons with foam inserts and pre-printed export labels meet the standards of major carriers across 60+ destination markets.
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Custom Branded PackagingRetail-ready packaging with your brand, regional compliance marks, and accessory inserts integrated from first production run — no third-party packer needed.
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Global Logistics CoordinationSea, air, and express freight lanes supported. FOB, DDP, and FCL/LCL terms available — your order dispatched within 5–7 days of QC sign-off.
Factory Equipment & Quality Control System
Advanced production and testing equipment ensuring stable quality from PCBA to finished power adapters.
ROHS Analyzer
Wave Soldering
Lightning Surge Generator
ATS Fuctional Test
ATE Functional Test
Aging Burn-In Test
Wire Bending Test Machine
Temperature And Humidity Chamber
Lightning Surge Generator
Laser Engraving Machine
Warehouse & Packaging
Scalable storage and efficient logistics system ensuring fast, accurate, and reliable global delivery.
Organized warehouse for fast fulfillment
Standard packaging for global shipping
Export-ready carton inspection & loading
99.8%
Order Accuracy Rate
60+
Shipping Destinations
5–7
Average Dispatch Time
800K+
Units Delivered Monthly
Partner with a Reliable
Power Adapter Manufacturer
Factory direct. Stable quality. Global certifications. Whether you need 500 units or 500,000 — we have the capacity and engineering depth to deliver.
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Factory Direct — No MiddlemenWork directly with the manufacturer. Lower cost, faster response, and full control over spec, compliance, and delivery schedule.
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280+ Global CertificationsUL, CE, FCC, CB, RoHS, IEC 60601 and more — your product ships market-ready to 60+ countries without re-testing delays.
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Full OEM / ODM CapabilityCustom power range, plug type, label, and packaging from first run. In-house R&D handles new product development from schematic to tooling.
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800,000 Units Monthly CapacityTwo production bases across Shenzhen and Dongguan. Scale from sample to mass production without switching suppliers or losing quality control.
Start Your Power Adapter Project