Raspberry Pi Power Supply, SoulBay 5V 3A Micro USB AC Adapter with 6Feet Long Cord for Raspberry Pi 3 2 Model B/B+ Pi A/A+ Zero, Android Tablet, Compatible with DC5V 2.5A 2A
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AI Verdict
This is a reliable 15W Micro USB power supply that cures undervoltage warnings on older Raspberry Pi 3s and Zeros, but Pi 4 owners need to look elsewhere.
If you run an older Raspberry Pi 3 or Pi Zero, this 5V/3A adapter provides the exact voltage needed to prevent CPU throttling. It fails as a modern Pi power supply because it uses the outdated Micro USB standard instead of USB-C.
If you have a Raspberry Pi 4, you must buy a 5V/3A power supply with a USB-C connector.
Regret Score™
Low RiskLower is better — measures purchase-regret risk from real buyer complaints, review credibility, and product maturity
Issues discovered after purchase
Critically weak dimension
Amazon rating vs actual quality
Chance this product isn't for you
Pros
- Delivers a true 3A output to eliminate the lightning bolt undervoltage warning on Pi 3 setups
- Powers demanding accessories like LCD screens and HATs without voltage drops
- ETL, CE, and FCC certified for safety, unlike many generic Pi power supplies
- Works perfectly as a replacement charger for the Flightscope Mevo+ launch monitor
Cons
- The advertised 6-foot length includes the power brick itself, making the actual cable closer to 5.5 feet
- Uses a Micro USB connector, making it physically incompatible with the Raspberry Pi 4 or 5
- The power brick is wide enough to block adjacent outlets on a standard power strip
- Some Octoprint users report occasional serial disconnects during long 3D prints
Dimension Scores
Consistently delivers 3 amps to clear Pi 3 undervoltage warnings.
Solid state design with no reported coil whine under load.
ETL certified for safety, but the plastic housing is bulky.
The cable is hardwired and the wall wart is wide enough to block adjacent outlets.
Best For
- Raspberry Pi 3 Model B or B+ running retro gaming emulators or media centers
- Powering a Flightscope Mevo+ launch monitor
- Pi Zero W setups that use power-hungry HATs or camera modules
Not Recommended For
- Raspberry Pi 4 or 5 owners, since those require a USB-C connector
- Tight power strips where the wide wall adapter will cover multiple plugs
Watch Out For
- The connector is Micro USB, not USB-C — if you bought a newer Pi 4, this plug physically will not fit.
- The 6-foot measurement includes the wall adapter block, so you actually get about 5.5 feet of usable cable.
- If you are running Octoprint for 3D printing, you might still experience serial disconnects if your USB cables to the printer aren't shielded.
Full Specifications
| ASIN | B07CVH21NC |
| Brand | SoulBay |
| Color | Black |
| Amperage | 3 Amps |
| Item Weight | 3.17 ounces |
| Manufacturer | SoulBay |
| Input Voltage | 240 Volts (AC) |
| Connector Type | Micro USB Type B |
| Special Feature | Short Circuit Protection |
| Total USB Ports | 1 |
| Item model number | DC23U |
| Compatible Devices | Raspberry Pi computer, Tablets |
| Product Dimensions | 2.8 x 1.81 x 0.98 inches |
| Included Components | Micro-USB jack |
| Is Discontinued By Manufacturer | No |
What Buyers Say
People buy this specifically to cure the low-voltage warnings on their older Raspberry Pi 3s, and it succeeds where standard 2A phone chargers fail. The 3-amp output handles Pi setups with attached LCD screens and HATs without dropping voltage. The biggest frustration is the cord length marketing, as the 6-foot claim includes the plug housing itself. A surprising number of golfers also use this successfully as a replacement charger for Flightscope Mevo+ launch monitors.
“Picked this up to resolve the undervoltage issues I was having with a traditional 2A phone charger and it's completely stable now, just wish the cord was an actual 6 feet.”
Common Praise
- Clears up the yellow lightning bolt undervoltage warning on Pi 3s
- Handles the extra power draw of attached LCD screens and HATs
- Works perfectly as a replacement for the Flightscope Mevo+
- Much more stable than using a standard 2A phone charger
Common Complaints
- The 6-foot length measurement is misleading because it includes the plug
- The wall adapter is bulky and blocks neighboring outlets
- Occasional disconnects when running Octoprint for 3D printers
- People accidentally buy it for Pi 4s and realize it's Micro USB
Ownership Tips
- The hardwired cable means you can't swap in a longer cord if the 5.5-foot reach isn't enough
- Runs slightly warm when powering a Pi 3 at full CPU load for hours, but never gets dangerously hot
- The Micro USB connector fits snugly and doesn't wiggle loose from the Pi's power port
Frequently Asked Questions
Will this work with a Raspberry Pi 4?
No. The Raspberry Pi 4 requires a USB-C connector, and this adapter uses the older Micro USB plug.
Is the cable actually 6 feet long?
Not exactly. The 6-foot measurement includes the bulky wall plug itself, so the flexible cable part is closer to 5.5 feet.
Does this fix the yellow lightning bolt warning on my Pi 3?
Yes. The 3-amp output provides enough overhead to stop undervoltage warnings, even if you have a screen or HAT attached.
Can I use this to charge a regular Android tablet?
Yes, as long as the tablet uses a Micro USB port. It supplies up to 3 amps for fast charging on compatible devices.
Will this work for a Flightscope Mevo+?
Yes. The Mevo+ uses a Raspberry Pi motherboard and a Micro USB port, and buyers confirm this 3A charger works perfectly for it.
Buying Guide
When powering a Raspberry Pi, a standard phone charger fails because they usually max out at 2 amps, causing the Pi to throttle its CPU and display a low-voltage warning. You need a dedicated power supply that pushes a full 3 amps at 5 volts. Before buying, physically look at your Raspberry Pi's power port. If it is shaped like a tiny trapezoid, it is Micro USB and this adapter will work. If it is a symmetrical oval, it is USB-C and you need a different product.
5V 3A Output
Think of voltage (5V) as the water pressure and amperage (3A) as the pipe size. A 3A pipe ensures your Pi gets enough power even when you plug in extra USB devices.
Micro USB Connector
This is the older, trapezoid-shaped plug used on the Pi 3 and Pi Zero. It physically will not fit into the newer Pi 4 or Pi 5.
ETL/CE/FCC Certification
These are safety testing standards. Cheap, uncertified power bricks can catch fire or fry your motherboard with voltage spikes.
Alternatives
If you have a Raspberry Pi 4 or 5, search for a 5V 3A power supply with a USB-C connector.
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