---
title: "Relay Tester — £60K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/automotive/relay-tester"
last_updated: "2026-08-09T09:05:05.615Z"
locale: en
meta:
description: "Niche score 57/100 · £60K/yr market · 38K searches/yr. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 57/100 · £60K/yr market · 38K searches/yr. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Relay Tester — £60K/yr Amazon UK Niche (2026) - Flapen"
---
# **relay tester**
**Worth a look**
Shows a thin review moat (28 avg reviews), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 15Growth 15Conversion 88Competition 51Returns 75Price range 74Avg price 75Brand share 77Review moat 99Quality gap 87
**Review moat**
**Incredible****28.3**
avg incumbent reviews — the moat a new listing must climb
**Conversion**
**Great****10.4%**
search→purchase rate — share of searches ending in a sale
**Quality gap**
**Great****4.1★**
avg incumbent rating — lower means beatable quality
**Brand share**
**Great****58%**
top-5 brand share — no brand owns this niche
**Returns**
**Great****2.0%**
return rate — above 5% kills the launch gate
**Avg price**
**Great****£15.10**
avg listing price — sweet spot $15–$100
**Price range**
**Good****£7.06–£37.62**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Competition**
**Good****55%**
top-5 click share — leaders hold, buyers still browse
**Market size**
**Bad****£60K**
£60K/yr · 38K searches
**Growth**
**Bad****-19.4%**
90-day search growth — must beat 0% to launch
**Signals**[** No Dominant Brand**](https://flapen.com/research/niches?market=uk&signal=no_dominant_brand "Top brand's click share < 20%") [** Low Review Barrier**](https://flapen.com/research/niches?market=uk&signal=low_review_barrier "Top brand's reviews < 500")
According to Flapen's Amazon United Kingdom niche tracking, relay tester is a £60K/yr Amazon United Kingdom market (38K searches/yr). The top 5 brands hold 58% of demand. Verdict: Worth a look — 57/100.
Data updated Jul 18, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **relay tester market data**
- **Units sold / yr**
- **3K–4K**
- avg 100–250/product
- **Revenue / yr**
- **£45K–£60K**
- units × avg price
- **Conversion rate**
- **10.4%**
- **Avg BSR**
- **#344**
- **Page quality**
- **0%**
- **Prime**
- **95%**
- **Sponsored**
- **90%**
- **Out of stock**
- **8.0%**
- **Avg brand age**
- **28 months**
- **Avg seller age**
- **214 days**
## **Competition & brand share**
The top 5 products take 55% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**19 **▼falling
**Sellers**
**28**
**Top-5 brand share**
**58%**
Top 20: 100%
**Top-5 click share**
**55%**
Top 20: 100%
**Open market**
**36%**
- OBDResource19% - DUZEPA14% - Cloudpower9% - XINZHIZHU8% - GEARLEADER7% - Aivane6%
## **Demand**
Weekly Amazon search volume, last 22 weeks — -19.4% search growth over the last 90 days.
1K600Feb '26Mar '26Mar '26Apr '26May '26May '26Jun '26
[**Open Trend **](https://flapen.com/research/uk/automotive/relay-tester/trend)
## **Top relay tester search terms**
- **relay tester**27K/yr-16.3%7.7% conv. - **car relay tester**6K/yr-13.4%7.7% conv. - **relay tester 12-24v**5K/yr-39.9%8.8% conv. [**All search terms **](https://flapen.com/research/uk/automotive/relay-tester/search-terms)
## **Top relay 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.
0%4%£2K8%£5K12%£7K16%£10K1101001K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 20 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Relay Tester 12-24v Car Relas Tester 12/24v Car Relas Testser Automotive Relaye Testser Circuit System Diagnostic Repair Tool For Vehicles Rvs Boats And Campers**OBDResource**£20.25**4.3★60 rev](https://www.amazon.co.uk/dp/B0FKSJ7354) [2**DUZEPA Car Relay Tester RT01 4-Pin 5-Pin Detection Tool with LCD Display for 12V and 24V Relays in Multiple Vehicle Types and Applications**DUZEPA**£10.90**4.1★20 rev](https://www.amazon.co.uk/dp/B0FX44YSSQ) [3**Relay Analyzer For 12V And 24V Systems Automotive Relay Test Meter With Digital Display Power Analyzer Car for battery Tester Motorcycle Circuit Sensor Test Box**Cloudpower**£10.36**4.2★19 rev](https://www.amazon.co.uk/dp/B0FGQDZY3P) [4**12V Automotive Relay Tester Car Electronic Relay Circuit Tester Kit Diagnostic Tools Battery Checker Universal 4PIN 5PIN Fast Testing with LED Indicator Lights for Trucks Cars Electrical System**XINZHIZHU**£9.43**4.0★29 rev](https://www.amazon.co.uk/dp/B0FPGDTRNR) [5**GEARLEADER 12V Automotive Electronic Relay Tester Car Relay Tester Universal LED Indicator Light Car Battery Checker 4PIN 5PIN Fast Testing**GEARLEADER**£12.21**3.9★16 rev](https://www.amazon.co.uk/dp/B0DPQ4WKLN)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Automotive Relay Tester 12-24V Universal Car Battery Alternator Checker with Clips 4PIN/5PIN Fast Testing Tool with LED Indicator Circuit System Diagnostic Repair Tool for Cars Trucks RVs Boats**Pretify**£7.06**5 rev4mo ago](https://www.amazon.co.uk/dp/B0GSPLY9JF) [**RT01 Automotive Relay Tester Relay Analyzer For 12V And 24V Systems Car for battery Tester Motorcycle Circuit Sensor With Digital Display (RT01-BF01)**GLOBALHUT**£9.77**2 rev4mo ago](https://www.amazon.co.uk/dp/B0GR5K4KMJ) [**Relay Tester 12V-24V Automotive Car Relays Tester 4 Pin 5 Pin Relay Detection Diagnostic Tool Circuit System Diagnostic Repair Tool Battery/Type-C for Auto Motorcycle Rvs Boats Campers**Delousiber**£33.49**3 rev6mo ago](https://www.amazon.co.uk/dp/B0GCZBGT5F) [**12V Relay Tester Car Fuse Tester with 4PIN/5PIN Fast Testing Clips**oibek**£8.37**11 rev7mo ago](https://www.amazon.co.uk/dp/B0G4ZRMLLN) [**Automotive Current Tester Car Circuit Relay Fuse Tester High-Precision Current Tester Fault Detection with Backlit Display 20A 48V Car Battery Tester Including a Electrical Tape**Wsndyjia**£14.01**2 rev7mo ago](https://www.amazon.co.uk/dp/B0G4RD2GB8)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Automotive Relay Tester 12-24V Universal Car Battery Alternator Checker with Clips 4PIN/5PIN Fast Testing Tool with LED Indicator Circuit System Diagnostic Repair Tool for Cars Trucks RVs Boats**Pretify**£7.06**3.1★**▲ 233%**](https://www.amazon.co.uk/dp/B0GSPLY9JF) [**DUZEPA Car Relay Tester RT01 4-Pin 5-Pin Detection Tool with LCD Display for 12V and 24V Relays in Multiple Vehicle Types and Applications**DUZEPA**£10.90**4.1★**▲ 149%**](https://www.amazon.co.uk/dp/B0FX44YSSQ) [**Relay Tester 12V-24V Automotive Car Relays Tester 4 Pin 5 Pin Relay Detection Diagnostic Tool Circuit System Diagnostic Repair Tool Battery/Type-C for Auto Motorcycle Rvs Boats Campers**Delousiber**£33.49**5.0★**▲ 128%**](https://www.amazon.co.uk/dp/B0GCZBGT5F) [**Car for battery Tester Automotive Relay Tester For 12V/24V Systems Digital for battery Analyzer with LCD Display Vehicle Circuit Testing Tool for Auto Motorcycle Marine Cars Trucks**Drhomeam**£11.83**4.3★**▲ 107%**](https://www.amazon.co.uk/dp/B0G1ZNGCPJ) [**RT01 Automotive Relay Tester Relay Analyzer For 12V And 24V Systems Car for battery Tester Motorcycle Circuit Sensor With Digital Display (RT01-BF01)**GLOBALHUT**£9.77**4.5★**▲ 75%**](https://www.amazon.co.uk/dp/B0GR5K4KMJ)
**~~View all trending →~~**
## **What buyers say about relay tester**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Ease Of Use**26%
*“Easy to use”*
**Quality-Overall**20%
*“Well built and accurate”*
**Value For Money**14%
*“A lot better than the cheaper options on amazon”*
**Efficiency**8%
*“Tester is good excellent works well”*
**Advertised Vs Actual Product**7%
*“it did the job”*
**Compatibility-Overall**5%
*“The compatibility is excellent, easily covering all the 4-pin and 5-pin relays I encounter on cars, bikes, and even a friends boat”*
**Maintenance And Repair**3%
*“Ok fixed it”*
**Functionality-Overall**3%
*“Works perfectly i tried it on a known good relay it was correct”*
**Add-Ons/Attachments**2%
*“Well pleased and well worth the cost, brilliant accessory”*
**Size-Overall**1%
*“Easy to fit”*
### **What buyers complain about **
**Functionality-Overall**26%
*“Did not work”*
**Quality-Overall**13%
*“Sadly I had to rate this item as 3 stars as its very cheaply made”*
**Size-Overall**12%
*“One thing to note: the leads are very short”*
**Compatibility-Overall**8%
*“Does not fit relays”*
**Natural Resource Wastage**8%
*“Waste of no ey”*
**Instructions/User Manual/Troubleshooting**5%
*“No instructions”*
**Defective Material/Parts**5%
*“Shows fault relay when it was working”*
**Add-Ons/Attachments**3%
*“the black crocodile clip isn't even connected”*
**Product Condition**3%
*“this was supposed to be a brand new item”*
**Value For Money**3%
*“Not worth the money, avoid”*
### **Top return reasons **
**Compatibility-Overall**22%
**Functionality-Overall**21%
**Size-Overall**18%
**Defective Material/Parts**16%
**Connectivity-Overall**8%
**Advertised Vs Actual Product**3%
**Quality-Overall**3%
**Value For Money**2%
**Brightness/Shine/Glow**1%
**Product Condition**1%
## **Common questions**
- **Is relay tester profitable to sell on Amazon United Kingdom?**
- The niche generates £60K/yr across 20 tracked products. 0 of 12 products launched in the last 360 days are still selling. 90-day search growth is -19.4%. Flapen's verdict: Worth a look (57/100).
- **How competitive is the relay tester niche?**
- 19 brands and 28 sellers compete. The top 5 products take 55% of clicks and top 5 brands hold 58% of demand.
- **What do buyers complain about in relay tester?**
- Top complaints mined from reviews: Functionality-Overall, Quality-Overall, Size-Overall. The return rate is 2.0%.
- **What does it cost to enter the relay tester niche?**
- Listings span £7.06–£37.62; the average listing price is £15.10 (sweet spot $15–$100). The average incumbent carries 28 reviews — the moat a new listing must climb.
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