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Geekworm Power Supply for Raspberry Pi 4, 20W 5V 4A USB C Power Adapter Type C… competes with other Single-Board Computers products on SpecPicks. Use our Compare tool to view specs side-by-side, or browse the full Single-Board Computers category for alternatives.

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/KVM-A3/KVM-A8/X651/X735/X306/X728/X703

Name: 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
Brand: Geekworm
SKU: B09J856PND
Price: 9.90 USD
Availability: InStock
Rating: 4.7 (199 reviews)

By SpecPicks Editorial · Verified 2026-06-07

$9.90 ★★★★½4.7(199 reviews)

Buy on Amazon — $9.90 Compare to similar single-board computers

*Price sourced from Amazon.com. Last updated 2026-06-07. Price and availability subject to change.

Bottom line: The 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/KVM-A3/KVM-A8/X651/X735/X306/X728/X703 is a category leader on buyer feedback in the single-board computers category, priced around $9.90, rated 4.7★ across 199 verified Amazon reviews. A confident buy for most shoppers in this category.

About this item 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…

SpecPicks Verdict

SpecPicks classifies Geekworm Power Supply for Raspberry Pi 4, 20W 5V 4A USB C Power… as a category leader on buyer feedback in the single-board computers category, based on 199 verified Amazon reviews and our ranking model that weights rating × review-volume × price-fit. Geekworm's positioning sits comfortably above the category median. Use the Compare tool to put it side-by-side with two or three close alternatives before clicking through to Amazon.

Common buyer scenarios for single-board computers of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.

Pros & Cons

Pros

✓ Highly rated — 4.7★ average across customer reviews
✓ Packing List 1x 5V 4A US Plug Type-C Power Supply
✓ Backed by Geekworm's warranty and support channels
✓ Ships via Amazon with Prime eligibility and the standard returns policy

Cons

✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified

Key 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

Full Specifications

ASIN	B09J856PND
Brand	Geekworm
Color	Black
Wattage	20 watts
Amperage	4 Amps
Portable	No
Power Plug	Type A - 2 pin (North American)
Unit Count	1.0 Count
Item Weight	131 Grams
Manufacturer	Geekworm
Model Number	TB-2021-35
Power Source	Corded Electric
Input Voltage	240 Volts
Mounting Type	Wall Mount

Ready to buy?

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/KVM-A3/KVM-A8/X651/X735/X306/X728/X703 is available on Amazon with Prime shipping and the full Amazon returns policy. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Check price on Amazon →

*Price sourced from Amazon.com. Last updated 2026-06-07. Price and availability subject to change.