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The Geekworm 20W 5V 4A USB-C Power Adapter is a UL certified, high-performance charger engineered for Raspberry Pi 4 Model B and a broad spectrum of compatible single-board computers and accessories. Featuring robust safety protections and a universal USB-C interface, it ensures stable, reliable power delivery with a convenient 1.2m cable, making it the go-to choice for tech professionals and makers who refuse to compromise on quality or reliability.








| ASIN | B09J856PND |
| Amperage | 4 Amps |
| Brand | Geekworm |
| Built-In Media | 1x 5V 4A US Plug Type-C Power Supply |
| Color | berry |
| 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 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 devices Orange Pi 5/5B/3B/5 Plus, Phone with USB Type-C power in port, Raspberry Pi 4 Model B, RockPi, Thinker Board See more |
| Compatible phone models | Raspberry Pi 4 8GB/4GB/2GB/1GB |
| Connectivity Technology | USB |
| Connector Type | usb |
| Connector type | usb |
| Current Rating | 4 Amps |
| Customer Package Type | FFP |
| Customer Reviews | 4.7 out of 5 stars 190 Reviews |
| Enclosure Material | Plastic |
| Form Factor | Standard USB C Charging Adapter |
| Frequency Range | 50-60 Hz |
| Included components | 1x 5V 4A US Plug Type-C Power Supply |
| Input Voltage | 5 Volts |
| Item Weight | 131 Grams |
| 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 Amps |
| Output Voltage | 5 Volts |
| Portable | No |
| Power Plug | Type A - 2 pin (North American) |
| Power Source | Corded Electric |
| Special Features | Short Circuit Protection |
| Special features | Short Circuit Protection |
| Specification Met | UL |
| Total USB 3.0 Ports | 1 |
| Total Usb Ports | 1 |
| Unit Count | 1.0 Count |
| Voltage | 5 Volts |
| Wattage | 20 watts |
C**R
Impeccable
It looks and works exactly as described. It is somewhat more voluminous than the original Raspberry Pi source because it is more powerful. Quality looks very good. No more “low voltage” messages. 😃
V**T
No more undervoltage warnings on my Pi
I picked this up to power a Raspberry Pi in a small project after getting tired of random undervoltage warnings from whatever charger happened to be in the drawer. Several months in, it has run cool and stable with no low voltage complaints, even with a drive and a couple of accessories hanging off the board. It feels like a properly built supply rather than a generic brick, and I like knowing it is UL listed for something that stays plugged in around the clock. My only note is the cable. It is a little short, so where the project sits relative to the outlet matters, and I ended up moving mine to a closer plug. Not a deal breaker, just something to measure first. If you are running a Pi or a similar board, this has been the reliable option for me.
M**A
Buen producto.
Buen producto, cumple con el objetivo. Relación costo/calidad es bueno
A**R
El cable esta algo corto
Cumple bien su función lo uso con un mister pi, el único unico inconvenientes es que el cable esta algo corto, y el cuadrito esta muy grande
G**R
I use it daily 😎
It works. Quality is pretty good too. Take good care of it and I am sure it’ll last for many decades 😁
Trustpilot
2 days ago
1 month ago