iUniker
iUniker 5V 4A USB-C Power Supply for Raspberry Pi 4
Bottom line: The iUniker 5V 4A USB-C Power Supply for Raspberry Pi 4 ($9.99 on Amazon as of 2026-10-06): 5V 4A (20W max) output helps prevent Pi 4 undervoltage warnings under heavy load; main trade-off: not compatible with the Raspberry Pi 5's higher power requirements.
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*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.
Pros & Cons
Pros
- ✓ 5V 4A (20W max) output helps prevent Pi 4 undervoltage warnings under heavy load
- ✓ Built-in on/off switch powers the Pi down without unplugging the USB-C port
- ✓ 5ft (1.5m) cable gives placement flexibility on desks, kiosks, and lab benches
- ✓ UL listed with over-current, over-voltage, and short-circuit protection
- ✓ 100-240V input works worldwide; also powers Orange Pi 5 and 5B boards
Cons
- ✗ Not compatible with the Raspberry Pi 5's higher power requirements
- ✗ Fixed 5V output only; not suited to devices that need higher USB-C voltages
- ✗ 5ft cable can leave excess slack in compact enclosures or tight builds
- ✗ Warranty length not specified; listing cites only a satisfaction guarantee
Manufacturer description
The iUniker 5V 4A USB-C power supply is built for the Raspberry Pi 4 Model B in all memory configurations (1GB, 2GB, 4GB and 8GB). It delivers up to 20W, which gives the board steady current when you add USB drives, a camera or a busy CPU workload. That headroom helps prevent the undervoltage warnings that can cause throttling and unstable SD card writes. A built-in on/off switch on the cable lets you power the Pi down or reboot it without pulling the plug. Fewer plug cycles mean less wear on the board's USB-C port, which helps on kiosks, desktop builds and classroom setups that get switched…
SpecPicks Verdict
SpecPicks scored iUniker 5V 4A USB-C Power Supply for Raspberry Pi 4 using a rating × review-volume × price-fit model applied to published specs and reviews across the single board computers category. iUniker's single board computers lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
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 retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Frequently Asked Questions
Will this power supply work with my Raspberry Pi 4 8GB?
Yes. It outputs 5V 4A (20W max) over USB-C and is listed as compatible with every Raspberry Pi 4 Model B memory version: 1GB, 2GB, 4GB and 8GB.
Can I use it to power a Raspberry Pi 5?
No. The manufacturer states it is not compatible with the Raspberry Pi 5's higher power needs. It is intended for the Pi 4, Orange Pi 5/5B and other USB-C devices that run on 5V 4A.
How long is the cable, and does it have a power switch?
The cable is 5ft (1.5m) long and has a built-in on/off switch, so you can power the board on or off without unplugging it from the USB-C port.
Can I use this adapter outside the US?
The adapter accepts 100-240V input, so it works on mains voltages worldwide. Depending on your country's wall outlets, you may need a plug adapter.
What safety protections does it include, and is there a warranty?
It is UL listed with over-current, over-voltage and short-circuit protection. iUniker offers a customer satisfaction guarantee; check the product listing for current warranty terms.
Key Features
- 【Stable & Reliable 20W Power Delivery】Outputs 5V 4A (20W max) to prevent undervoltage warnings; specially tested and optimized for Raspberry Pi 4 Model B (1GB–8GB) to ensure smooth performance even under heavy load.
- 【Convenient Built-in ON/Off Switch】Easily power your Pi on or off without unplugging — extends cable and port lifespan, perfect for frequent use in projects, kiosks, or desktops.
- 【Extra-Long 5ft (1.5m) Cable】Provides greater flexibility for placement; ideal for makers, hobbyists, classrooms, or home labs without restricting movement.
- 【UL Listed Safety Certification】Meets strict safety standards with over-current, over-voltage, and short-circuit protection; works worldwide with 100–240V input — peace of mind for you and your devices.
- 【Broad Compatibility】Perfect replacement or backup charger for Raspberry Pi 4, Orange Pi 5/5B, and other USB-C devices requiring stable 5V 4A power (not compatible with Pi 5's higher power needs).
- 【Premium Build & Long Warranty】High-quality materials for durability and low heat; backed by iUniker’s customer satisfaction guarantee — contact us anytime for support.
Full Specifications
| Brand | iUniker |
|---|---|
| Color | Black |
| Current | AC |
| Wattage | 20 |
| Amperage | 4 A |
| Power Plug | Type A - 2 pin (North American) |
| Unit Count | 1 Count |
| Connectivity | USB-C |
| Model Number | XSG-0503500HUS |
| Power Source | AC |
| Compatibility | Switch |
| Input Voltage | 240 volts |
| Mounting Type | Wall Mount |
| Built-In Media | 1* 5.25V 4.0A USB C power supply |
| Connector Type | USB Type C |
| Output Current | 4 A |
| Output Voltage | 5.25 volts |
| Frequency Range | 50-60Hz |
| Mfr Part Number | AUB097P2NLVH |
| Number of Items | 1 |
| Full listing title | 5V 4A USB-C Power Supply for Raspberry Pi 4, 20W Charger with ON/Off Switch, 5ft Cable, UL Listed - Compatible with Pi 4 Model B (8GB/4GB/2GB/1GB) & Orange Pi 5/5B |
Ready to buy?
5V 4A USB-C Power Supply for Raspberry Pi 4, 20W Charger with ON/Off Switch, 5ft Cable, UL Listed - Compatible with Pi 4 Model B (8GB/4GB/2GB/1GB) & Orange Pi 5/5B is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.
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