---
title: "Extension Block — $139K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/electronics/extension-block"
last_updated: "2026-08-11T18:14:46.585Z"
locale: en
meta:
description: "Niche score 55/100 · $139K/yr market · 90K searches/yr · $17.28 avg price. Strong incumbent ratings (4.7★) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 55/100 · $139K/yr market · 90K searches/yr · $17.28 avg price. Strong incumbent ratings (4.7★) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Extension Block — $139K/yr Amazon US Niche (2026) - Flapen"
---
# **extension block**
**Worth a look**
Shows low returns (1.4%), but strong incumbent ratings (4.7★) keeps it on the watch list.
Market size 31Growth 25Conversion 83Competition 82Returns 87Price range 79Avg price 81Brand share 72Review moat 19Quality gap 17
**Returns**
**Great****1.4%**
return rate — above 5% kills the launch gate
**Conversion**
**Great****8.9%**
search→purchase rate — share of searches ending in a sale
**Competition**
**Great****33%**
top-5 click share — an open shelf
**Avg price**
**Great****$17.28**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$9.27–$37.90**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Brand share**
**Good****62%**
top-5 brand share — brands hold most of the demand
**Market size**
**Okay****$139K**
$139K/yr · 90K searches
**Growth**
**Bad****-0.1%**
90-day search growth — must beat 0% to launch
**Review moat**
**Bad****14,602.4**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
**Signals**[** No Dominant Brand**](https://flapen.com/research/niches?market=us&signal=no_dominant_brand "Top brand's click share < 20%")
According to Flapen's Amazon United States niche tracking, extension block is a $139K/yr Amazon United States market (90K searches/yr). The top 5 brands hold 62% of demand. Demand peaks in Jan. Verdict: Worth a look — 55/100.
Data updated Jul 17, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **extension block market data**
- **Units sold / yr**
- **8K–10K**
- avg 100–250/product
- **Revenue / yr**
- **$138K–$173K**
- units × avg price
- **Conversion rate**
- **8.9%**
- **Avg BSR**
- **#92**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **75%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **46 months**
- **Avg seller age**
- **182 days**
## **Competition & brand share**
Clicks spread well past the top 5 (33% combined) — an open shelf where new products get seen.
**Brands**
**27 **▲rising
**Sellers**
**81**
**Top-5 brand share**
**62%**
Top 20: 95%
**Top-5 click share**
**33%**
Top 20: 71%
**Open market**
**32%**
- Anker19% - Addtam15% - Amazon Basics13% - TESSAN8% - Belkin7% - YISHU7%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -0.1% search growth over the last 90 days.
2K2KSpike '24Holiday '24Spike '25Prime Day '25Holiday '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Jan · busiest ÷ quietest = 1.9×
[**Open Trend **](https://flapen.com/research/us/electronics/extension-block/trend)
## **Top extension block search terms**
- **white surge protector power strip**26K/yr+12.8%8.2% conv. - **power strip white**22K/yr-2.9%7.7% conv. - **white surge protector**20K/yr-10.7%6.2% conv. - **angled power strip**6K/yr+1.7%2.4% conv. - **right angle surge protector**5K/yr-9.0%6.6% conv. - **white powerstrips with surge protector**3K/yr+8.5%8.0% conv. - **narrow power strip**4K/yr-9.2%2.6% conv. - **sideways power strip**3K/yr+7.3%5.6% conv. [**All search terms **](https://flapen.com/research/us/electronics/extension-block/search-terms)
## **Top extension block 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%3%$4K6%$8K9%$13K12%$17K1001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Flat Plug Power Strip Ultra Thin Flat Extension Cord - Addtam 12 Outlet 3 Sides Multiple Outlets 5Ft 1050J Surge Protector Wall Mount Desk Charging Station for Home Office Dorm Room Essentials**Addtam**$10.19**4.8★4,221 rev](https://www.amazon.com/dp/B0BVVPFRP7) [2**6 Ft Surge Protector Power Strip - 8 Widely Outlets with 4 USB Ports 3 Side Outlet Extender with 6 Feet Extension Cord Flat Plug Wall Mount Desk USB Charging Station ETL White**YISHU**$9.41**4.6★51,188 rev](https://www.amazon.com/dp/B09PDLBFKY) [3**Anker Power Strip with 2100J Surge Protector Outlet Extender 5ft Extension Cord with Multiple Outlets 12 AC 2 USB A 1 USB C Port for 20W Home Office Dorm Room Essentials TUV Listed**Anker**$27.05**4.8★19,415 rev](https://www.amazon.com/dp/B09SG3GV43) [4**Anker Power Strip with 300J Surge Protector Flat Plug Extension Cord with Multiple Outlets 6 AC 2 USB A & 2 USB C Ports for 20W 5ft Outlet Extender Dorm Room Essentials Home Office**Anker**$23.08**4.7★4,532 rev](https://www.amazon.com/dp/B0CKR7B9T9) [5**Amazon Basics Rectangle 6-Outlet Surge Protector Power Strip with Circuit Breaker 600 Joule 2ft Cord White 2-Pack**Amazon Basics**$11.29**4.7★44,273 rev](https://www.amazon.com/dp/B0D1XJR9YR)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**10Ft Extension Cord with Multiple Outlets SUPERDANNY Flat Plug Surge Protector Power Strip 10 Ft Long Cord 6 Outlets & 3 USB Ports Charging Station for Home Office College Dorm Room Essentials**SUPERDANNY**$12.65**8,298 rev9mo ago](https://www.amazon.com/dp/B0FPFF7JN8) [**TROND Surge Protector Power Strip with 360 Rotating Flat Plug 5 Widely Spaced Outlets with 2 USB C and 2 USB A 1440J Surge Protector Wall Mountable Extension Cord 6ft for Home Office Dorm White**TROND**$21.40**2,086 rev1y ago](https://www.amazon.com/dp/B0DZH74C5L) [**Amazon Basics Rectangle 6-Outlet Surge Protector Power Strip with Circuit Breaker 600 Joule 2ft Cord White 2-Pack**Amazon Basics**$11.29**44,273 rev1y ago](https://www.amazon.com/dp/B0D1XJR9YR) [**Amazon Basics 12-Outlet Surge Protector Power Strip 4000 Joules 8ft Extension Cord Rectangle for Home Office Gaming Room White**Amazon Basics**$17.95**490 rev1y ago](https://www.amazon.com/dp/B0D1X99TFB) [**Anker Power Strip 900J Surge Protector 35W Max**Anker**$26.48**1,319 rev1y ago](https://www.amazon.com/dp/B0D14HKY6Q)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**GE Surge Protector Power Strip 6 Ft Extension Cord 6 Outlet Extender 800 Joules Flat Plug Twist-to-Close Safety Covers ETL Listed White 67051**GE**$13.48**4.8★**▲ 190%**](https://www.amazon.com/dp/B09N7T1TN5) [**10Ft Extension Cord with Multiple Outlets SUPERDANNY Flat Plug Surge Protector Power Strip 10 Ft Long Cord 6 Outlets & 3 USB Ports Charging Station for Home Office College Dorm Room Essentials**SUPERDANNY**$12.65**4.7★**▲ 170%**](https://www.amazon.com/dp/B0FPFF7JN8) [**TROND Surge Protector Power Strip with 360 Rotating Flat Plug 5 Widely Spaced Outlets with 2 USB C and 2 USB A 1440J Surge Protector Wall Mountable Extension Cord 6ft for Home Office Dorm White**TROND**$21.40**4.7★**▲ 125%**](https://www.amazon.com/dp/B0DZH74C5L) [**Amazon Basics Power Strip Surge Protector with 6 Outlets 2 USB Ports 1000 Joule Protection 6-Foot Extension Cord White**Amazon Basics**$11.15**4.8★**▲ 110%**](https://www.amazon.com/dp/B07NSJMSK3) [**Amazon Basics 12-Outlet Surge Protector Power Strip 4000 Joules 8ft Extension Cord Rectangle for Home Office Gaming Room White**Amazon Basics**$17.95**4.8★**▲ 101%**](https://www.amazon.com/dp/B0D1X99TFB)
**~~View all trending →~~**
## **What buyers say about extension block**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**16%
*“Build quality is great”*
**Socket/Port/Plug**14%
*“All the ports work great”*
**Advertised Vs Actual Product**11%
*“Just as pictured”*
**Value For Money**8%
*“Excellent value”*
**Charging**7%
*“Great charger”*
**Ease Of Use**6%
*“Very handy”*
**Design-Overall**5%
*“Compact design”*
**Size-Overall**4%
*“Fit perfectly”*
**Drop/Impact Protection**3%
*“Surge Protector”*
**Strength**3%
*“Solid product”*
### **What buyers complain about **
**Durability**20%
*“Didnt last”*
**Socket/Port/Plug**9%
*“USB Ports Don't Work”*
**Noise Level**8%
*“Makes noise”*
**Functionality-Overall**8%
*“Did not work”*
**Quality-Overall**8%
*“Cheap quality”*
**Charging**7%
*“Does not charge”*
**Size-Overall**4%
*“Large size”*
**Advertised Vs Actual Product**3%
*“false advertisement”*
**Value For Money**3%
*“A little pricey”*
**Heating**2%
*“Immediately caused overheating”*
### **Top return reasons **
**Size-Overall**25%
**Socket/Port/Plug**12%
**Functionality-Overall**11%
**Advertised Vs Actual Product**8%
**Value For Money**8%
**Defective Material/Parts**5%
**Charging**4%
**Compatibility-Overall**3%
**Product Condition**3%
**Quality-Overall**2%
## **Common questions**
- **Is extension block profitable to sell on Amazon United States?**
- The niche generates $139K/yr across 52 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -0.1%. Flapen's verdict: Worth a look (55/100).
- **How competitive is the extension block niche?**
- 27 brands and 81 sellers compete. The top 5 products take 33% of clicks and top 5 brands hold 62% of demand.
- **What do buyers complain about in extension block?**
- Top complaints mined from reviews: Durability, Socket/Port/Plug, Noise Level. The return rate is 1.4%.
- **When does demand for extension block peak?**
- Demand peaks in Jan; the busiest month runs 1.9× the quietest.
- **What does it cost to enter the extension block niche?**
- Listings span $9.27–$37.90; the average listing price is $17.28 (sweet spot $15–$100). The average incumbent carries 14,602 reviews — the moat a new listing must climb.
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