[5V 3A UL Listed] iUniker Power Supply for Raspberry Pi 3, MicroUSB Power Adapter with on/Off Switch Compatible with Raspberry Pi 3/ 3b+/ Zero/Zero 2w

Name: [5V 3A UL Listed] iUniker Power Supply for Raspberry Pi 3, MicroUSB Power Adapter with on/Off Switch Compatible with Raspberry Pi 3/ 3b+/ Zero/Zero 2w
Brand: Unknown Brand
SKU: B0B79FVPQ4
Rating: 4.6 (9 reviews)

ASIN: B0B79FVPQ4

Analysis Date: Aug 26, 2026

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Review Analysis Results

Authenticity Grade

10.00%

Fake Reviews

4.89

Original Rating

4.60

Adjusted Rating

Analysis Summary

The vast majority of these reviews appear genuine, with clear personal context and specific technical details that indicate real user experiences. Nearly all reviews mention specific use cases such as Raspberry Pi projects, DMR hotspots, 3D printing with OctoPrint, or ham radio applications, which are niche and require actual product usage. The reviews also reference common issues like undervoltage warnings and the 'lightning bolt' icon, which are well-known Raspberry Pi problems, and describe how this power supply resolved them. This level of specificity and technical accuracy is a strong indicator of authenticity.

Evidence of authenticity is abundant. For example, one reviewer describes using the power supply for a DMR hotspot with a Raspberry Pi 3 B and MMDVM duplex hat, noting undervoltage warnings that caused services to restart. Another mentions using it with OctoPrint for a 3D printer, switching from a 2.5A adapter to this 3A one to resolve low voltage alerts. A third reviewer talks about running a print server 24/7 and experiencing reboots with a random phone charger, which stopped after switching. These personal stories and detailed problem-solving narratives are classic genuine signals. Additionally, one review provides a balanced perspective, noting that they still see the lightning bolt occasionally, which adds credibility.

There are minimal concerns. The first review is somewhat generic and promotional in tone, with phrases like 'I couldn't be happier with the results' and a formal structure that could be seen as marketing language. However, it still mentions being a Raspberry Pi enthusiast and the importance of a reliable power supply, which is plausible. No other reviews show signs of manipulation, such as repetitive phrasing or lack of specifics. The high ratings are consistent with a product that effectively solves a common problem for Raspberry Pi users.

In summary, the reviews are overwhelmingly genuine, with detailed personal experiences and technical accuracy. The only slight concern is the first review's generic tone, but it does not exhibit clear manipulation patterns. The product appears to be a reliable 5V 3A power supply that resolves undervoltage issues for Raspberry Pi users, as evidenced by the authentic feedback.

Key patterns identified in the review analysis include: Specific use cases (Raspberry Pi projects, DMR hotspot, 3D printing), Mention of undervoltage warnings and lightning bolt icon, Personal problem-solving narratives.

Review Statistics

529

Total Reviews on Amazon

-0.29

Rating Difference

Editor's Analysis

Power Your Pi Projects Right: iUniker 5V/3A MicroUSB Adapter Insights

Sarah Chen

Senior Editor, Consumer Protection

When powering a Raspberry Pi 3, 3B+, or Zero, a stable 5V/3A supply is non-negotiable. The iUniker adapter, with its integrated on/off switch and UL listing, addresses common power-related crashes and convenience concerns. This guide helps you evaluate if it meets your specific project needs.

Key Considerations Before Buying

Voltage and current stability: For Raspberry Pi 3B+ and other power-hungry models, a 5V/3A supply ensures enough headroom for USB peripherals and Wi-Fi, preventing under-voltage warnings and random reboots.
Connector type: This adapter uses a MicroUSB connector, which is compatible with Pi 3, 3B+, Zero, and Zero 2W, but not Pi 4 or newer models that require USB-C. Confirm your board's port before purchasing.
On/off switch: The built-in switch is a practical feature for projects where you need to power-cycle the Pi without unplugging, but ensure the switch is rated for the current and doesn't introduce voltage drops.

What Our Analysts Recommend

Look for UL listing (safety certification) to ensure the adapter meets basic safety standards. Check for user reviews mentioning stable voltage under load, especially with peripherals like cameras or SDR dongles. A solid build quality and a cable that's not too stiff are also good indicators of a reliable power supply.

Internal Power Supplies Market Context

Market Overview

The market for Raspberry Pi power supplies is crowded with generic chargers, but the demand for reliable, project-specific adapters is growing as Pi usage expands in home automation, amateur radio, and 3D printing. Many users prefer UL-listed options to avoid fire hazards and voltage instability.

Common Issues

Common problems include insufficient current causing under-voltage warnings (yellow lightning bolt icon), cheap cables that drop voltage, and adapters that overheat or fail after months of use. Some users also report that certain supplies are noisy, interfering with radio or audio projects.

Quality Indicators

Quality indicators include UL or other safety certifications, a stable 5V output measured under load, and positive reviews from users who run demanding applications like OctoPrint or DMR hotspots. A warranty and responsive customer support are also positive signs.

Review Authenticity Insights

Grade B Interpretation

The Grade B and 10.00% estimated fake review percentage suggest that while the vast majority of reviews are likely genuine, a small fraction may be incentivized or unverified. This is typical for popular electronics, and the 4.89 rating is still a strong signal, but the adjusted rating of 4.60 is more realistic.

Trust Recommendation

Given the high genuine review count and specific use-case mentions, you can trust this product's performance. However, be cautious of reviews that are overly generic or lack personal project details. Cross-reference the adjusted rating to gauge true satisfaction.

Tips for Reading Reviews

When reading reviews for power supplies, focus on comments about voltage stability, heat, and longevity. Look for users who mention their specific Pi model and peripherals—this indicates real-world testing. Also, note any patterns of failures after a few months, as that's a common issue with cheap adapters.

Expert Perspective

The iUniker 5V/3A power supply appears to be a reliable choice for Raspberry Pi 3 and Zero series users, with a high genuine satisfaction rate and a practical on/off switch. The UL listing adds safety assurance, and the 10% fake review rate is low enough to not undermine trust. The adjusted rating of 4.60 still reflects strong performance, especially for niche applications like ham radio and 3D printing.

Purchase Considerations

Weigh the need for a MicroUSB connection against future upgrades—if you plan to move to a Pi 4 or 5, you'll need a USB-C adapter. Also, consider the length of the cable and whether the switch is easily accessible for your project. Price-wise, it's competitive, but ensure it matches your current Pi model.

Comparing Alternatives

Shoppers should compare with official Raspberry Pi power supplies and other UL-listed brands to ensure optimal compatibility and performance, especially for high-current projects.

Price Analysis

This power adapter is a budget-friendly, safety-certified option for Raspberry Pi users, typically priced between $15-$20. Given its high rating and UL listing, it's a reliable choice, but wait for a discount below $12 for the best value. Always verify the seller to avoid counterfeit or overpriced listings.

MSRP Assessment

Estimated MSRP: $15-$20

Source: Product category average

Amazon Price: Unable to compare

Market Position

Positioning: Budget

Alternatives Range: $10-$25

Value: This UL-listed adapter with a switch offers safety and convenience at a price comparable to generic alternatives, making it a solid value for Raspberry Pi users.

Buying Tips

Best Time to Buy: Prices for Raspberry Pi accessories tend to be stable year-round, but you may see slight discounts during Prime Day or Black Friday.

Deal Indicators: A good deal would be under $12, especially if it includes a switch and UL certification. Look for coupons or bundle offers with cables.

Watch For: Beware of non-UL listed adapters that are significantly cheaper—they may pose safety risks. Also, check that the price isn't inflated due to third-party sellers; compare with official listings.

Price analysis generated by AI based on product category and market research. Actual prices may vary. Last analyzed: Aug 26, 2026

Understanding This Analysis

What does Grade B mean?

This product has good review authenticity with minor concerns. While most reviews appear genuine, we detected some patterns that warrant mild caution.

Adjusted Rating Explained

The adjusted rating (4.60 stars) represents what we estimate this product's rating would be if fake reviews were removed. This product's adjusted rating is lower than Amazon's displayed rating (4.89 stars), suggesting positive fake reviews may be inflating the score.

How We Detect Fake Reviews

Our AI analyzes multiple factors: language patterns (generic vs. specific), reviewer behavior (history, timing), temporal anomalies (review clusters), verification status, sentiment authenticity, and statistical outliers. No single factor determines a review is fake - we look at the combination of signals.

Important Limitations

No automated system is perfect. Sophisticated fake reviews can evade detection, and some genuine reviews may be incorrectly flagged. Use this analysis as one data point in your purchasing decision, not the only factor. Reading actual review content yourself is always valuable.