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

The niche generates $127K/yr across 8 tracked products. 90-day search growth is -13.7%. Flapen's verdict: Skip it (39/100).

How competitive is the power supply tester niche?

8 brands and 34 sellers compete. The top 5 products take 89% of clicks and top 5 brands hold 89% of demand.

What do buyers complain about in power supply tester?

Top complaints mined from reviews: Functionality-Overall, Durability, Instructions/User Manual/Troubleshooting. The return rate is 3.5%.

When does demand for power supply tester peak?

Demand is steady year-round — the busiest month runs 1.3× the quietest.

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

Listings span $10.02–$43.10; the average listing price is $17.31 (sweet spot $15–$100). The average incumbent carries 423 reviews — the moat a new listing must climb.

power supply tester

Skip it

A concentrated shelf (top 5 take 89% of clicks) — this niche doesn't clear our bar today.

Conversion

Great9.2%

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

Price range

Great$10.02–$43.10

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

Avg price

Great$17.31

avg listing price — sweet spot $15–$100

Review moat

Great422.88

avg incumbent reviews — the moat a new listing must climb

Returns

Okay3.5%

return rate — above 5% kills the launch gate

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Market size

Okay$127K

$127K/yr · 80K searches

Brand share

Okay89%

top-5 brand share — brands hold most of the demand

Growth

Bad-13.7%

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

Competition

Bad89%

top-5 click share — a locked-up shelf

According to Flapen's Amazon United States niche tracking, power supply tester is a $127K/yr Amazon United States market (80K searches/yr). The top 5 brands hold 89% of demand. Verdict: Skip it — 39/100.

Data updated Jul 21, 2026 · scored weekly · How we score niches

power supply tester market data

Units sold / yr: 6K–8K; avg 750–1,000/product
Revenue / yr: $104K–$138K; units × avg price
Conversion rate: 9.2%
Avg BSR: #227
Page quality: 0%
Prime: 100%
Sponsored: 63%
Out of stock: 0.0%
Avg brand age: 45 months
Avg seller age: 181 days

Competition & brand share

The top 5 products capture 89% of clicks — a locked-up shelf that new listings rarely crack.

Brands

8 flat

Sellers

Top-5 brand share

89%

Top 20: 100%

Top-5 click share

89%

Top 20: 100%

Open market

Fuhengli38%
Thermaltake19%
Kingwin15%
ASHATA9%
Comidox8%
Cunyuer5%
Open — no brand owns it (2 brands, 6%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -13.7% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.3×

Open Trend

Top power supply tester search terms

power supply tester32K/yr -12.8%7.9% conv.
psu tester27K/yr -10.8%10.0% conv.
pc power supply tester7K/yr -21.2%9.7% conv.
computer power supply tester6K/yr -24.1%7.5% conv.
atx power supply tester4K/yr +2.9%10.3% conv.
psu tester pc3K/yr -28.1%11.8% conv.

All search terms

Top power supply tester 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 8 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Computer PC Power Supply Tester ATX/ITX/IDE/HDD/SATA/BYI Connectors Power Supply Tester 1.8 LCD Screen (Aluminum Alloy Enclosure)

Fuhengli$16.044.5★1,860 rev

Thermaltake Dr. Power III ATX Power Supply Tester/Support up to ATX12V v3.1 with PCIe 12+4pin Connector/Voltage Output for +12V +5V +3.3V and +5Vsb AC-069-OO1NAN-A1

Thermaltake$43.104.8★179 rev

Kingwin Digital Power Supply Tester with LCD Screen Compatible with ATX ITX IDE HDD SATA and BTX Easy-to-Use Diagnostic Tool for PC Power Supply Testing (Aluminum)

Kingwin$16.744.6★609 rev

Computer PC Power Supply Tester ATX Power Supply Host Inspection Maintenance Tool PSU Tester Detect with 20/24 Pin LCD Display for ATX BTX ITX TFX.

ASHATA$14.664.4★105 rev

Comidox 1Pcs 20/24 Pin LCD Computer PC Power Supply Tester for ATX BTX ITX TFX SATA with Buzzer Automatic Alarm

Comidox$10.054.5★477 rev

Newest

by launch date

Cunyuer Computer Power Supply Tester 20/24 Pin Computer PC Power Supply Tester with LCD Display for ATX BTX ITX TFX

Cunyuer$14.655 rev

1y ago

Thermaltake Dr. Power III ATX Power Supply Tester/Support up to ATX12V v3.1 with PCIe 12+4pin Connector/Voltage Output for +12V +5V +3.3V and +5Vsb AC-069-OO1NAN-A1

Thermaltake$43.10179 rev

2y ago

PC Power Supply Diagnostic LCD Computer Testing Device Computer 20/24 4/6/8 Pin Supply Tester for SATA IDE HDD ATX ITX Byi Plug

BUBUCAM$10.0270 rev

2y ago

ATX Power Supply Tester 20/24 4/6/8 Pin Computer Host Inspection and Maintenance Tester Tool with Buzzer and LCD Display for ATX ITX BTX PCI E SATA HDD

VBESTLIFE$13.2178 rev

4y ago

Computer PC Power Supply Tester ATX Power Supply Host Inspection Maintenance Tool PSU Tester Detect with 20/24 Pin LCD Display for ATX BTX ITX TFX.

ASHATA$14.66105 rev

6y ago

What buyers say about power supply tester

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

What buyers love

Quality-Overall28%

“Excellent build quality”

Ease Of Use20%

“very easy to use”

Value For Money20%

“GreatValue for Peace of Mind”

Functionality-Overall7%

“This was definitely helpful to check the PSU was working”

Advertised Vs Actual Product6%

“Does the job”

Connectivity-Overall4%

“the 24-pin connection tester works fantastic with easy to read LED display”

Socket/Port/Plug4%

“also ensuring the voltages are in spec on all sorts of connectors”

Maintenance And Repair4%

“One of the best power testers Ive ever used if you want a repair shop this is a great item to have in your shop the day I bought it I needed to use it to test the power supply”

Durability2%

“has better durablility”

Design-Overall2%

“It does what its designed to do”

What buyers complain about

Functionality-Overall15%

“Not working, burn the PC power supply with first test”

Durability12%

“Died”

Instructions/User Manual/Troubleshooting12%

“No instructions”

Quality-Overall8%

“I know it's not the best”

Compatibility-Overall8%

“Disappointing because it does not work with all power supplies”

Design-Overall8%

“Fancy looking doesn't mean functional”

Connectivity-Overall8%

“Turned out that over time I simply had a connection come a little loose”

Defective Material/Parts8%

“it definitely would have harmed the component I plugged into it”

Socket/Port/Plug8%

“It can't plug in all the way”

Accuracy-Overall4%

“I cannot attest to the accuracy since I have no other way to test power supplies with”

Top return reasons

Functionality-Overall30%

Compatibility-Overall12%

Advertised Vs Actual Product9%

Defective Material/Parts8%

Value For Money7%

Socket/Port/Plug7%

Product Condition7%

Connectivity-Overall6%

Size-Overall3%

Instructions/User Manual/Troubleshooting2%

Common questions

Is power supply tester profitable to sell on Amazon United States?: The niche generates $127K/yr across 8 tracked products. 90-day search growth is -13.7%. Flapen's verdict: Skip it (39/100).
How competitive is the power supply tester niche?: 8 brands and 34 sellers compete. The top 5 products take 89% of clicks and top 5 brands hold 89% of demand.
What do buyers complain about in power supply tester?: Top complaints mined from reviews: Functionality-Overall, Durability, Instructions/User Manual/Troubleshooting. The return rate is 3.5%.
When does demand for power supply tester peak?: Demand is steady year-round — the busiest month runs 1.3× the quietest.
What does it cost to enter the power supply tester niche?: Listings span $10.02–$43.10; the average listing price is $17.31 (sweet spot $15–$100). The average incumbent carries 423 reviews — the moat a new listing must climb.