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
*Price sourced from Amazon.com. Last updated 2026-07-22. 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 niche pick — read recent reviews before buying in the single-board computers category, priced around $9.90. Read recent reviews carefully before committing.
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 niche pick — read recent reviews before buying in the single-board computers category, based on our editorial and benchmark analysis and our ranking model that weights rating × review-volume × price-fit. Geekworm's positioning sits within the broader category mid-tier. 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
- ✓ 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.
*Price sourced from Amazon.com. Last updated 2026-07-22. Price and availability subject to change.
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