---
title: "Fenix Battery — $64K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/fenix-battery"
last_updated: "2026-08-11T15:00:09.768Z"
locale: en
meta:
description: "Niche score 37/100 · $64K/yr market · 93K searches/yr · $30.98 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 37/100 · $64K/yr market · 93K searches/yr · $30.98 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Fenix Battery — $64K/yr Amazon US Niche (2026) - Flapen"
---
# **fenix battery**
**Skip it**
Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Market size 16Growth 21Conversion 28Competition 15Returns 64Price range 89Avg price 95Brand share 0Review moat 95Quality gap 62
**Review moat**
**Great****104**
avg incumbent reviews — the moat a new listing must climb
**Avg price**
**Incredible****$30.98**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$11.46–$62.72**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Returns**
**Good****2.4%**
return rate — above 5% kills the launch gate
**Quality gap**
**Good****4.4★**
avg incumbent rating — lower means beatable quality
**Conversion**
**Okay****2.2%**
search→purchase rate — share of searches ending in a sale
**Growth**
**Bad****-8.8%**
90-day search growth — must beat 0% to launch
**Market size**
**Bad****$64K**
$64K/yr · 93K searches
**Competition**
**Bad****82%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, fenix battery is a $64K/yr Amazon United States market (93K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Sep. Verdict: Skip it — 37/100.
Data updated Jul 21, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **fenix battery market data**
- **Units sold / yr**
- **3K–4K**
- avg 100–250/product
- **Revenue / yr**
- **$93K–$124K**
- units × avg price
- **Conversion rate**
- **2.2%**
- **Avg BSR**
- **#803**
- **Page quality**
- **0%**
- **Prime**
- **64%**
- **Sponsored**
- **36%**
- **Out of stock**
- **6.7%**
- **Avg brand age**
- **47 months**
- **Avg seller age**
- **180 days**
## **Competition & brand share**
The top 5 products capture 82% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**3 **▲rising
**Sellers**
**54**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**82%**
Top 20: 100%
**Open market**
**0%**
- Streamlight55% - GLESOURCE24% - Kastar21%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -8.8% search growth over the last 90 days.
5K4KSpike '24Prime Day '25Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Sep · busiest ÷ quietest = 2.0×
[**Open Trend **](https://flapen.com/research/us/health-household/fenix-battery/trend)
## **Top fenix battery search terms**
- **streamlight sl-b26 battery**10K/yr+116.4%0.8% conv. - **sl-b26 streamlight battery**16K/yr-7.5%1.2% conv. - **streamlight sl-b26**14K/yr-51.4%0.7% conv. - **streamlight sl-b26 rechargeable battery**8K/yr+24.8%2.2% conv. - **sl-b26**11K/yr-40.0%0.3% conv. - **slb26 battery streamlight**7K/yr-26.3%1.6% conv. - **streamlight 18650**7K/yr-31.6%0.4% conv. - **sl b26 streamlight battery**4K/yr-16.1%1.5% conv. - **sl-b26 battery**4K/yr-7.2%0.6% conv. - **streamlight 18650 rechargeable battery**5K/yr-31.3%0.4% conv. [**All search terms **](https://flapen.com/research/us/health-household/fenix-battery/search-terms)
## **Top fenix battery 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%10%$6K20%$13K30%$19K40%$26K1101001K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 11 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Streamlight 22010 Rechargeable Button Top Li-Ion USB Battery/Charger**Streamlight**$49.55**4.5★143 rev](https://www.amazon.com/dp/B01BI9TTBM) [2**Kastar 2Pack Battery + Travel Charger Replacement for SLB26 Battery Stinger 2020 ProTac HL 5-X USB PolyTac 90 X USB Right Angle Light PolyTac X USB ProTac 90 X USB**Kastar**$27.80**4.7★3 rev](https://www.amazon.com/dp/B0BHHGQB92) [3**GLESOURCE 3.7V USB Rechargeable Battery (2 Pack) 2600mAh Lithium Ion Batteries Compatible for Streamlight SL-B26 Streamlight 22104**GLESOURCE**$19.89**4.1★7 rev](https://www.amazon.com/dp/B0H1PSLCNH) [4**GLESOURCE 3.7V USB Rechargeable Battery (4 Pack) 2600mAh Lithium Ion Batteries Compatible for Streamlight SL-B26 Streamlight 22104**GLESOURCE**$36.82**4.1★7 rev](https://www.amazon.com/dp/B0H1PRVP8K) [5**STRMLGHT STRION 2020 Battery**Streamlight**$44.63**4.8★6 rev](https://www.amazon.com/dp/B0D7VKL334)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**GLESOURCE 3.7V USB Rechargeable Battery (2 Pack) 2600mAh Lithium Ion Batteries Compatible for Streamlight SL-B26 Streamlight 22104**GLESOURCE**$19.89**7 rev2mo ago](https://www.amazon.com/dp/B0H1PSLCNH) [**GLESOURCE 3.7V USB Rechargeable Battery (4 Pack) 2600mAh Lithium Ion Batteries Compatible for Streamlight SL-B26 Streamlight 22104**GLESOURCE**$36.82**7 rev2mo ago](https://www.amazon.com/dp/B0H1PRVP8K) [**Streamlight 78118 Lithium Ion Battery - Stinger 2020 S**Streamlight**$38.04**8 rev1y ago](https://www.amazon.com/dp/B0DNTRQ3T8) [**STRMLGHT STRION 2020 Battery**Streamlight**$44.63**6 rev2y ago](https://www.amazon.com/dp/B0D7VKL334) [**STRMLGHT SLB2 Battery 2PK**Streamlight**$18.44**5 rev2y ago](https://www.amazon.com/dp/B0D7VH2QFX)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**GLESOURCE 3.7V USB Rechargeable Battery (2 Pack) 2600mAh Lithium Ion Batteries Compatible for Streamlight SL-B26 Streamlight 22104**GLESOURCE**$19.89**4.1★**▲ 26%**](https://www.amazon.com/dp/B0H1PSLCNH) [**GLESOURCE 3.7V USB Rechargeable Battery (4 Pack) 2600mAh Lithium Ion Batteries Compatible for Streamlight SL-B26 Streamlight 22104**GLESOURCE**$36.82**4.1★**▲ 26%**](https://www.amazon.com/dp/B0H1PRVP8K) [**Kastar 2Pack Battery + Travel Charger Replacement for SLB26 Battery Stinger 2020 ProTac HL 5-X USB PolyTac 90 X USB Right Angle Light PolyTac X USB ProTac 90 X USB**Kastar**$27.80**4.7★**▲ 25%**](https://www.amazon.com/dp/B0BHHGQB92) [**Kastar 1-Pack STL1870 Battery Replacement for Streamlight SL-B26 for ProTac HL-X HL 5-X 2L-X Flashlights 3.7V 2600mAh**Kastar**$11.46**3.2★**▲ 13%**](https://www.amazon.com/dp/B0CQTH4VM6) [**STRMLGHT STRION 2020 Battery**Streamlight**$44.63**4.8★**▲ 11%**](https://www.amazon.com/dp/B0D7VKL334)
**~~View all trending →~~**
## **What buyers say about fenix battery**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Battery Life**36%
*“Great flashlight battery”*
**Quality-Overall**18%
*“Good product”*
**Compatibility-Overall**9%
*“Worked on my streamlight,,333943 0722”*
**Storage Capacity**9%
*“Love the larger capacity works great”*
**Advertised Vs Actual Product**9%
*“As described”*
**Brightness/Shine/Glow**5%
*“Perfect for flashlights”*
**Size-Overall**5%
*“Perfect fit and function”*
**Value For Money**5%
*“Cheaper replacement than the streamlight batteries”*
### **What buyers complain about **
**Charging**21%
*“Wont charge”*
**Compatibility-Overall**14%
*“Is not even compatible with the flashlights that are listed”*
**Battery Life**14%
*“Note I cant comment on battery life etc as I just received it”*
**Socket/Port/Plug**14%
*“The USB C plugs don't fit well”*
**Functionality-Overall**7%
*“Will not sustain high output draw”*
**Defective Material/Parts**7%
*“Wrong parts included”*
**Durability**7%
*“Well that didnt last long”*
**Design-Overall**7%
*“Not well made”*
### **Top return reasons **
**Battery Inclusion**70%
**Size-Overall**15%
**Charging**4%
**Compatibility-Overall**2%
**Advertised Vs Actual Product**2%
**Functionality-Overall**2%
**Socket/Port/Plug**1%
**Product Condition**1%
**Brightness/Shine/Glow**1%
**Battery Life**1%
## **Common questions**
- **Is fenix battery profitable to sell on Amazon United States?**
- The niche generates $64K/yr across 11 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is -8.8%. Flapen's verdict: Skip it (37/100).
- **How competitive is the fenix battery niche?**
- 3 brands and 54 sellers compete. The top 5 products take 82% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in fenix battery?**
- Top complaints mined from reviews: Charging, Compatibility-Overall, Battery Life. The return rate is 2.4%.
- **When does demand for fenix battery peak?**
- Demand peaks in Sep; the busiest month runs 2.0× the quietest.
- **What does it cost to enter the fenix battery niche?**
- Listings span $11.46–$62.72; the average listing price is $30.98 (sweet spot $15–$100). The average incumbent carries 104 reviews — the moat a new listing must climb.
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