Is universal power supply profitable to sell on Amazon United States?

The niche generates $69K/yr across 14 tracked products. 90-day search growth is -13.5%. Flapen's verdict: Skip it (35/100).

How competitive is the universal power supply niche?

8 brands and 11 sellers compete. The top 5 products take 71% of clicks and top 5 brands hold 92% of demand.

What do buyers complain about in universal power supply?

Top complaints mined from reviews: Functionality-Overall, Quality-Overall, Compatibility-Overall. The return rate is 4.9%.

When does demand for universal power supply peak?

Demand peaks in Nov–Dec; the busiest month runs 2.2× the quietest.

What does it cost to enter the universal power supply niche?

Listings span $11.46–$18.17; the average listing price is $14.81 (sweet spot $15–$100). The average incumbent carries 3,161 reviews — the moat a new listing must climb.

universal power supply

Skip it

A small market ($69K/yr) — this niche doesn't clear our bar today.

Conversion

Great7.6%

search→purchase rate — share of searches ending in a sale

Avg price

Good$14.81

avg listing price — sweet spot $15–$100

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Price range

Okay$11.46–$18.17

cheapest to priciest tracked listing — scored on the share inside $15–$100

Review moat

Okay3,161.43

avg incumbent reviews — the moat a new listing must climb

Returns

Okay4.9%

return rate — above 5% kills the launch gate

Competition

Bad71%

top-5 click share — a locked-up shelf

Brand share

Bad92%

top-5 brand share — brand-locked demand

Growth

Bad-13.5%

90-day search growth — must beat 0% to launch

Market size

Bad$69K

$69K/yr · 61K searches

According to Flapen's Amazon United States niche tracking, universal power supply is a $69K/yr Amazon United States market (61K searches/yr). The top 5 brands hold 92% of demand. Demand peaks in Nov–Dec. Verdict: Skip it — 35/100.

Data updated Jul 22, 2026 · scored weekly · How we score niches

universal power supply market data

Units sold / yr: 4K–5K; avg 100–250/product
Revenue / yr: $59K–$74K; units × avg price
Conversion rate: 7.6%
Avg BSR: #46
Page quality: 0%
Prime: 100%
Sponsored: 100%
Out of stock: 0.0%
Avg brand age: 43 months
Avg seller age: 192 days

Competition & brand share

The top 5 products capture 71% of clicks — a locked-up shelf that new listings rarely crack.

Brands

8 falling

Sellers

Top-5 brand share

92%

Top 20: 100%

Top-5 click share

71%

Top 20: 100%

Open market

Wefomey37%
SoulBay20%
ALITOVE15%
Belker12%
SHNITPWR8%
minidodoca3%
Open — no brand owns it (2 brands, 5%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -13.5% search growth over the last 90 days.

Peak months: Nov, Dec · busiest ÷ quietest = 2.2×

Open Trend

Top universal power supply search terms

universal ac adapter27K/yr +4.3%4.4% conv.
universal dc power adapter8K/yr -10.3%6.3% conv.
multi voltage power supply5K/yr -13.4%3.7% conv.
multi voltage power adapter6K/yr -9.7%5.7% conv.
universal ac dc adapter charger3K/yr -63.3%2.4% conv.
universal dc power supply3K/yr -13.3%5.4% conv.
multi power adapter3K/yr -12.0%3.5% conv.
universal ac dc adapter3K/yr -17.8%3.0% conv.
universal dc adapter3K/yr -8.8%2.0% conv.

All search terms

Top universal power supply products on Amazon

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 14 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Universal Power Supply 3V~24V 3A 72W Adjustable Variable 3V 5V 9V 12V 18V 20V 24V AC/DC Adapter Charger 100V-240V AC to DC Converter with 14 Tips Polarity Converter and 4-Way Power Splitter Cable

Wefomey$18.024.5★613 rev

ALITOVE 30W Universal Power Adapter Adjustable AC Adapter 100-240V 50-60Hz to DC 3V 4.5V 5V 6V 7.5V 9V 12V 2.5A Max Variable Power Supply 3V~12V 0.5A 1A 1.5A 2A with 5V 2.1A USB Port 14Tips 4.9FT Cord

ALITOVE$15.424.3★546 rev

SHNITPWR 3V ~ 24V 3A 72W Power Supply Adjustable DC 3V 5V 6V 9V 12V 15V 16V 18V 19V 20V 24V Variable Universal AC/DC Adapter 100V-240V AC to DC Converter with 14 Tips 5.5x2.5mm 4.0x1.7mm 3.5x1.35mm

SHNITPWR$17.724.4★3,143 rev

SoulBay 12V Power Supply Universal AC DC Adapter Charger with Adjustable Output 5V 9V 3V 6V 4.5V 7.5V 12 Volt 1A 1.5A 2A for LED Strip Light CCTV Camera BT Speaker GPS Webcam Router 5 FT Cord 30W

SoulBay$15.694.2★13,526 rev

Belker 12W Universal 3V 4.5V 5V 6V 7.5V 9V 12V AC DC Adapter Power Supply with 8 Interchangeable Tips for Household Electronics - Max. 1000mA

Belker$11.464.4★2,979 rev

Newest

by launch date

Universal Power Supply 3V~24V 3A 72W Adjustable Variable 3V 5V 9V 12V 18V 20V 24V AC/DC Adapter Charger 100V-240V AC to DC Converter with 14 Tips Polarity Converter and 4-Way Power Splitter Cable

Wefomey$18.02613 rev

1y ago

SoulBay Universal AC DC Power Supply Adapter 72W 3V to 24V Output with Adjustable Voltage & Volt Display for Household Electronics 14pcs Tips & 1pc Reverse Polarity Cable Included 3000mA Max

SoulBay$18.17162 rev

3y ago

72W Power Supply Adjustable 3V ~ 24V Variable Universal Switching AC/DC Adapter Minidodoca AC to DC Converter with LED Voltage Display and 16 Tips for 3V to 24V Household Electronics - 3000mA Max

minidodoca$15.92547 rev

3y ago

Arkare 30W Universal AC to DC Power Adapter Adjustable Power Supply 3V 4.5V 6V 9V 12V 2A 1A DC Adapter AC 100-240V to DC 3-12V Multi Voltage Switching Power Adapter with 15 Tips + Polarity Converter

Arkare$13.02454 rev

4y ago

SoulBay [Reverse Polarity] 30W Universal AC DC Adapter Switching Power Supply Selectable Voltage with 9 Tips for 3V 4.5V 5V 6V 7.5V 9V 12V Household Electronics 2000mA 2Amps Output Max

SoulBay$15.86386 rev

5y ago

What buyers say about universal power supply

What buyers praise and complain about, mined from review topics.

What buyers love

Advertised Vs Actual Product15%

“As advertised”

Charging14%

“Good charger”

Quality-Overall13%

“It seems to be well-made”

Value For Money7%

“affordable option yet works well”

Ease Of Use7%

“Easy to use”

Functionality-Overall6%

“works well”

Socket/Port/Plug5%

“the USB plugs are a handy addition”

Size-Overall5%

“Correct size”

Efficiency4%

“Works great”

Battery Life4%

“Finally a clever charger for all those batteries built into products we use occasionally as needed”

What buyers complain about

Functionality-Overall19%

“Does not work as advertised”

Quality-Overall11%

“The build quality seems very poor”

Compatibility-Overall9%

“it's wasn't compatible”

Durability8%

“Failed after 4 months”

Charging8%

“It does not charge one single item”

Size-Overall6%

“The size doesn't fit”

Connectivity-Overall4%

“ruin your item connected”

Instructions/User Manual/Troubleshooting3%

“AND there were no instructions included”

Touch/Button Controls2%

“The knob can barely be touch”

Product Condition2%

“It really looks a used returned item”

Top return reasons

Compatibility-Overall32%

Size-Overall22%

Functionality-Overall14%

Charging12%

Defective Material/Parts4%

Connectivity-Overall3%

Advertised Vs Actual Product2%

Socket/Port/Plug2%

Value For Money1%

Add-Ons/Attachments1%

Common questions

Is universal power supply profitable to sell on Amazon United States?: The niche generates $69K/yr across 14 tracked products. 90-day search growth is -13.5%. Flapen's verdict: Skip it (35/100).
How competitive is the universal power supply niche?: 8 brands and 11 sellers compete. The top 5 products take 71% of clicks and top 5 brands hold 92% of demand.
What do buyers complain about in universal power supply?: Top complaints mined from reviews: Functionality-Overall, Quality-Overall, Compatibility-Overall. The return rate is 4.9%.
When does demand for universal power supply peak?: Demand peaks in Nov–Dec; the busiest month runs 2.2× the quietest.
What does it cost to enter the universal power supply niche?: Listings span $11.46–$18.17; the average listing price is $14.81 (sweet spot $15–$100). The average incumbent carries 3,161 reviews — the moat a new listing must climb.