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Charger Efficiency Explained: How Manufacturers Measure and Improve Power Efficiency

Charger Efficiency Explained: How Manufacturers Measure and Improve Power Efficiency

Sep 14, 2026

09-142026

Why Does My USB-C Charger Make a Buzzing or Whining Noise? Causes, Testing and Factory Solutions

Why Does My USB-C Charger Make a Buzzing or Whining Noise? Causes, Testing and Factory Solutions

Sep 10, 2026

09-102026

A USB-C charger may make a buzzing or whining sound because magnetic components such as transformers and inductors can vibrate during high-frequency switching. The sound can be more noticeable at no load or light load when the charger enters burst-mode operation. A faint, stable sound may be normal, while loud or sudden noise combined with overheating or charging interruptions should be investigated.
Why Does My USB-C Charger Keep Disconnecting? Causes, Testing and Factory Solutions

Why Does My USB-C Charger Keep Disconnecting? Causes, Testing and Factory Solutions

Sep 09, 2026

09-092026

A USB-C charger may keep disconnecting because of a damaged cable, poor USB-C connector contact, failed PD negotiation, overcurrent protection, overheating, unstable output, device compatibility or excessive cable resistance. A charger factory should reproduce the problem, test different cables and devices, monitor PD negotiation, check thermal and electrical performance, and then identify the root cause before mass production.
Charger Ripple and No-Load Ripple: What They Mean and How Engineers Test Them

Charger Ripple and No-Load Ripple: What They Mean and How Engineers Test Them

Sep 04, 2026

09-042026

Best 65W USB-C PD Charger OEM Platforms for Phone-Laptop Lines

Best 65W USB-C PD Charger OEM Platforms for Phone-Laptop Lines

Sep 03, 2026

09-032026

ZONSAN to Showcase Latest GaN Fast Charging Solutions at Global Sources Hong Kong Show 2026

ZONSAN to Showcase Latest GaN Fast Charging Solutions at Global Sources Hong Kong Show 2026

Sep 03, 2026

09-032026

Why Does My 100W Charger Drop to 65W When I Plug In Another Device?

Why Does My 100W Charger Drop to 65W When I Plug In Another Device?

Aug 28, 2026

08-282026

Why Is My Fast Charger Charging Slowly? 10 Reasons and What to Check

Why Is My Fast Charger Charging Slowly? 10 Reasons and What to Check

Aug 27, 2026

08-272026

Why Does My Charger Get Hot? Is It Dangerous? Causes, Solutions and Manufacturer Insights

Why Does My Charger Get Hot? Is It Dangerous? Causes, Solutions and Manufacturer Insights

Aug 20, 2026

08-202026

Can I Charge My Phone With a Laptop Charger? Everything You Need to Know

Can I Charge My Phone With a Laptop Charger? Everything You Need to Know

Aug 19, 2026

08-192026

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