---
product_id: 371659945
title: "Geekworm 20W 5V 4A USB C Power Supply for Raspberry Pi 4 Model B"
brand: "geekworm"
price: "£13.25"
currency: GBP
in_stock: true
reviews_count: 13
url: https://www.desertcart.co.uk/products/371659945-geekworm-20w-5v-4a-usb-c-power-supply-for-raspberry
store_origin: GB
region: United Kingdom
---

# 20W stable power output 4A high current delivery 5-fold safety protection Geekworm 20W 5V 4A USB C Power Supply for Raspberry Pi 4 Model B

**Brand:** geekworm
**Price:** £13.25
**Availability:** ✅ In Stock

## Summary

> ⚡ Power your Pi like a pro — no compromises, just pure performance!

## Quick Answers

- **What is this?** Geekworm 20W 5V 4A USB C Power Supply for Raspberry Pi 4 Model B by geekworm
- **How much does it cost?** £13.25 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/371659945-geekworm-20w-5v-4a-usb-c-power-supply-for-raspberry)

## Best For

- geekworm enthusiasts

## Why This Product

- Trusted geekworm brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Ready Out of the Box:** Includes a 1.2m USB-C cable and US plug for hassle-free setup and reliable wall mounting.
- • **Safety First, Always:** Built-in overvoltage, undervoltage, overcurrent, overtemperature, and short circuit protections keep your projects safe.
- • **Universal Compatibility:** Seamlessly powers Raspberry Pi 4 (all RAM versions), Orange Pi, Retroflag cases, and multiple expansion boards.
- • **Power Up with Confidence:** Certified UL-listed 5V 4A output ensures your Raspberry Pi 4 runs smoothly without undervoltage hiccups.
- • **Trusted by Makers Worldwide:** Geekworm’s dedicated design since 2013 means you’re joining a community of innovators who demand quality power.

## Overview

The Geekworm 20W 5V 4A USB-C Power Supply is a UL-certified, high-current adapter designed specifically for Raspberry Pi 4 Model B and compatible single-board computers. Featuring comprehensive safety protections and a 1.2m cable, it delivers stable, reliable power to keep your projects running flawlessly.

## Description

How to Test the PSU Output correctly?
Please refer to our test video: youtu.be/leqeFTJcSHk; the test method by Noah Ferro is not right test method, it need to add load to test the power supply output ability.
Does this power supply support fast charging?
No. This is a standard Type-C 5V 4A power adapter and does not support fast charging protocols.
PD 27W 5.1V 5A
20W 5V 4A
60W 12V 5A
PD 27W 5.1V 5A
PD 27W 5.1V 5A
Founded in 2013, Geekworm is dedicated to the development and design of Raspberry Pi accessories.
Geekworm helps Makers around the world focus on creativity and inspirationby providing innovative.
For Raspberry Pi 4

## Features

- Compatibility: USB-C Type C power adapter designed and tested for the Raspberry Pi 4 Model B 1GB/2GB/4GB/8GB Version; Also support NASPi/X-C1/X825/X735/X728/X708/X703/X306 expansion board/Retroflag PiStation Case/Orange Pi 5/5B/4B/3B/Pi 800/4 LTS/3 LTS/Zero 2/Zero 3
- Power Input: 100-240V AC, 50-60Hz, 0.8A Max; Output: 5V 4A 20W; Cable length: 1.2 m / 47.24 inches
- UL Listed 5.1V 4A USB-C Power Adapter for Raspberry Pi 4B: Certified Safety and Stable Power Supply to Prevent Under-Voltage Warnings
- Power Supply Functions: Over voltage protection; Under voltage protection; Over temperature protection; Over current protection; Short circuit protection
- Packing List: 1x 5V 4A US Plug Type-C Power Supply

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Amperage | 4 A |
| Asin | B09J856PND |
| Best Sellers Rank | #198 in Computer Power Supplies |
| Brand | Geekworm |
| Built In Media | 1x 5V 4A US Plug Type-C Power Supply |
| Color | Black |
| Compatible Devices | Orange Pi 5/5B/3B/5 Plus, Phone with USB Type-C power in port, Raspberry Pi 4 Model B, RockPi, Thinker Board |
| Compatible Phone Models | Raspberry Pi 4 8GB/4GB/2GB/1GB |
| Compatible Power Plug Type | Type C |
| Connectivity Technology | USB |
| Connector Type | usb |
| Current | DC |
| Current Rating | 4 A |
| Customer Package Type | FFP |
| Customer Reviews | 4.7 4.7 out of 5 stars (203) 4.7 out of 5 stars |
| Enclosure Material | Plastic |
| Form Factor | Stand |
| Frequency Range | 50-60 Hz |
| Input Voltage | 240 volts |
| Item Weight | 131 g |
| Main Power Connector Type | 2 Pin |
| Manufacturer | Geekworm |
| Mfr Part Number | TB-2021-35 |
| Model Name | Power Adapter |
| Model Number | TB-2021-35 |
| Mounting Type | Wall Mount |
| Number Of Items | 1 |
| Number Of Power Levels | 1 |
| Output Current | 4 A |
| Output Voltage | 5 volts |
| Plug Type | A - US style |
| Power Plug | Type A - 2 pin (North American) |
| Power Source | Corded Electric |
| Special Features | Short Circuit Protection |
| Specification Met | UL |
| Total Usb Ports | 1 |
| Unit Count | 1 Count |
| Voltage | 5 volts |
| Warranty Description | 3 months |
| Wattage | 20 watts |
| Wired Charging Connector Type | USB Type C |

## Product Details

- **Amperage:** 4 A
- **Brand:** Geekworm
- **Color:** Black
- **Compatible Phone Models:** Raspberry Pi 4 8GB/4GB/2GB/1GB
- **Connector Type:** usb
- **Included Components:** 1x 5V 4A US Plug Type-C Power Supply
- **Input Voltage:** 240 volts
- **Special Feature:** Short Circuit Protection
- **Total USB Ports:** 1

## Images

![Geekworm 20W 5V 4A USB C Power Supply for Raspberry Pi 4 Model B - Image 1](https://m.media-amazon.com/images/I/71vovZlNPUL.jpg)
![Geekworm 20W 5V 4A USB C Power Supply for Raspberry Pi 4 Model B - Image 2](https://m.media-amazon.com/images/I/71EHu6+Vw0L.jpg)
![Geekworm 20W 5V 4A USB C Power Supply for Raspberry Pi 4 Model B - Image 3](https://m.media-amazon.com/images/I/71oPrE05i0L.jpg)
![Geekworm 20W 5V 4A USB C Power Supply for Raspberry Pi 4 Model B - Image 4](https://m.media-amazon.com/images/I/71VmA4Nz5eL.jpg)
![Geekworm 20W 5V 4A USB C Power Supply for Raspberry Pi 4 Model B - Image 5](https://m.media-amazon.com/images/I/81pPb15ftoL.jpg)

## Questions & Answers

**Q: How to Test the PSU Output correctly?**
A: Please refer to our test video: youtu.be/leqeFTJcSHk; the test method by Noah Ferro is not right test method, it need to add load to test the power supply output ability.

**Q: Does this power supply support fast charging?**
A: No. This is a standard Type-C 5V 4A power adapter and does not support fast charging protocols.

## Customer Reviews

### ⭐⭐⭐⭐⭐ I use it daily 😎
*by  on Reviewed in the United States October 13, 2025*

It works. Quality is pretty good too. Take good care of it and I am sure it’ll last for many decades 😁

### ⭐⭐⭐⭐⭐ Great brick
*by  on Reviewed in the United States August 9, 2025*

Works great for my usb c ohm tech 18650 battery charger really needed a 4 amp power supply and this came in handy would recommend

### ⭐⭐⭐⭐⭐ One Happy Raspberry Pi
*by  on Reviewed in the United States February 22, 2025*

Works great and provides constant and continuous power to my Pi's.

## Frequently Bought Together

- Geekworm Power Supply for Raspberry Pi 4, 20W 5V 4A USB C Power Adapter Type C Charger UL Listed Compatible with Raspberry Pi 4 Model B/Orange Pi 5/NASPi/DACPi/X-C1/X735/X728/X708/X703
- Geekworm KVM-A3 Kit for Raspberry Pi 4 Open Source KVM Over IP Compatible with KVM V3 Platform Only (Unassembled and Not Include Raspberry Pi 4/SD Card/Power Adapter)
- Raspberry Pi 4 Model B 2019 Quad Core 64 Bit WiFi Bluetooth (4GB)

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*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-08-25*