简体中文 | English | HOTLINE: 13590301618
Shenzhen Keyulong Technology Co., Ltd.
Shenzhen power adapter and charger source manufacturer | Fast charger | 5W-120W custom power supply
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Quality Service
Shenzhen Keyulong Technology Co., Ltd.

Quality Service

HomeQuality Service


Quality Service · Total Peace of Mind

“Quality is Dignity” — A full-chain quality control system from R&D to delivery

I. Quality Hard Commitments

ParameterCommitment
Outgoing Yield Rate99.95%
MTBF (Mean Time Between Failures)≥50,000 hours
Annual Failure Rate≤0.05%

8 Full Inspections · Quality is Dignity

100+ International Certifications: CCC / CE / UL / FCC / PSE / KC ……

✅ Flame Retardant Rating V0 · Standby Power ≤0.3W

✅ Ripple ≤200mV · Voltage Accuracy ±5% · Long-life Design

II. Fast Response Service

Service ItemCommitment
After-sales Response<2 hours
Problem Resolution Rate98%
Stock Item Dispatch24 hours
Customization Response1 business day
Customization Lead Time15-20 days (industry average 20-30 days)

Standard Stock: Shipped within 24 hours on business days · Agile delivery

Full Lifecycle Technical Support: Selection → Sample → EMC rectification → Mass production → Retirement advice

10% emergency capacity reserved for strategic customers · Empowering partners

III. Customer Reputation

MetricData
Customer Repurchase Rate82%
NPS (Net Promoter Score)75+
Global Corporate Customers3,000+
Customer Complaint Rate<0.5% (industry average 3%)

 Industries served: Night lights, power tools, LED lighting, networking & communication equipment, security & surveillance, consumer electronics, industrial control, and more.

 Global cumulative delivery: over 100 million power adapters · Proven quality

 “Empowering Partners” reputation – preferred choice for long-term strategic cooperation

“Keyulong delivers not just power adapters, but peace of mind. From EMC rectification to mass production, the technical team accompanies every step. With a problem resolution rate of 98%, they truly provide ‘back-to-back’ partnership service.”

— Customer feedback from over 3,000 corporate clients

Empowering Partners, Making Every Watt Count

 High-reliability power adapter custom expert · Total peace of mind

 ISO9001:2015 · Full system compliance

 Green energy saving (standby ≤0.3W)

V0 flame retardant + 8 full inspections

 Key Account Hotline: 13590301618 (WeChat same as number)

Sales Inquiries: 18129821159

Website: www.szkeyulong.com | Search “Keyulong Power” on 1688

power adapter quality service, 8 full inspections, MTBF 50000 hours, 99.95% yield rate, CCC/CE/UL/FCC certification, V0 flame retardant, 0.3W standby, fast response, full lifecycle technical support, power adapter manufacturer, Shenzhen power adapter, Keyulong Technology

Shenzhen Keyulong Technology Co., Ltd. © All rights reserved粤ICP备2026062221号-1

Shenzhen Source Manufacturer for Power Adapters | Official  Website: www.szkeyulong.com/en/

Hotline
  • 13590301618
  • 18129821159
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