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Compact USB-C to 4.5 mm barrel adapter with LED wattage display and alloy shell

Fervit

Fervit USB-C to DC 4.5 mm PD 100 W Adapter with Wattage Display

SKU CH-5SRS-9Y37E

Connects a USB-C charger to a 4.5 mm DC laptop port, delivering up to 100 W with a real-time wattage display

  • Real-time power monitoring with LED voltage, current and wattage display
  • Up to 100 W PD fast charging via USB-C with QC 2.0 and QC 3.0 support
  • DC 4.5 mm barrel output delivers 20 V at 5 A for laptop power
  • Compact alloy shell, plug-and-play design for easy portability
  • Works with most USB-C chargers and DC laptops — verify jack size first

What this adapter does

The Fervit USB-C to DC 4.5 mm adapter converts a 100 W USB-C Power Delivery charger into a barrel-jack supply for laptops that use a 4.5 mm DC input. It is aimed at owners of compatible laptops who want to replace a proprietary brick with a single high-power USB-C charger.

The specification that decides fit

The adapter outputs a fixed 20 V at up to 5 A for a maximum of 100 W and requires a charger and cable rated for 100 W or higher to reach that level. It also negotiates 65 W and voltages between 18.5 V and 20.5 V, but it will not work with lower-power USB-C sources or laptops that need a different DC jack size or voltage.

Installation and common issues

Connection is plug-and-play: insert the USB-C male end into the charger and the DC male barrel into the laptop. The built-in LED display shows real-time voltage, current and wattage. The most frequent problem is using a charger or cable below 100 W, which prevents full power delivery, or mismatching the 4.5 mm barrel to a laptop that requires a different connector.

Highlights

  • Real-time power monitoring with LED voltage, current and wattage display
  • Up to 100 W PD fast charging via USB-C with QC 2.0 and QC 3.0 support
  • DC 4.5 mm barrel output delivers 20 V at 5 A for laptop power
  • Compact alloy shell, plug-and-play design for easy portability
  • Works with most USB-C chargers and DC laptops — verify jack size first

Specifications

BrandFervit

Questions about this item

What does the 100 W rating mean when I connect this adapter to my laptop?

The adapter can deliver up to 100 W at 20 V / 5 A, but only if the USB-C charger and cable also support 100 W or higher.

Which USB-C charging standards does the adapter negotiate, and what voltage ceiling do they impose?

It negotiates PD and QC 2.0 / 3.0, capping the output at 20 V / 5 A (100 W) when a 100 W source is used.

What barrel-plug size must my laptop's DC jack have for this adapter to fit?

The output is a 4.5 mm × 3.0 mm DC male barrel connector; your laptop must use that exact size.

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