fenix battery
Skip itBrand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Review moat
Great104avg incumbent reviews — the moat a new listing must climb
Avg price
Incredible$30.98avg listing price — sweet spot $15–$100
Price range
Great$11.46–$62.72cheapest to priciest tracked listing — scored on the share inside $15–$100
Returns
Good2.4%return rate — above 5% kills the launch gate
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Conversion
Okay2.2%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
Bad82%top-5 click share — a locked-up shelf
Brand share
Bad100%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
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.Peak months: Sep · busiest ÷ quietest = 2.0×
Top fenix battery search terms
- streamlight sl-b26 battery10K/yr
- sl-b26 streamlight battery16K/yr
- streamlight sl-b2614K/yr
- streamlight sl-b26 rechargeable battery8K/yr
- sl-b2611K/yr
- slb26 battery streamlight7K/yr
- streamlight 186507K/yr
- sl b26 streamlight battery4K/yr
- sl-b26 battery4K/yr
- streamlight 18650 rechargeable battery5K/yr
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.
All 11 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Streamlight 22010 Rechargeable Button Top Li-Ion USB Battery/Charger
Streamlight$49.554.5★143 rev
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$27.804.7★3 rev
GLESOURCE 3.7V USB Rechargeable Battery (2 Pack) 2600mAh Lithium Ion Batteries Compatible for Streamlight SL-B26 Streamlight 22104
GLESOURCE$19.894.1★7 rev
GLESOURCE 3.7V USB Rechargeable Battery (4 Pack) 2600mAh Lithium Ion Batteries Compatible for Streamlight SL-B26 Streamlight 22104
GLESOURCE$36.824.1★7 rev
STRMLGHT STRION 2020 Battery
Streamlight$44.634.8★6 rev
Newest
by launch dateGLESOURCE 3.7V USB Rechargeable Battery (2 Pack) 2600mAh Lithium Ion Batteries Compatible for Streamlight SL-B26 Streamlight 22104
GLESOURCE$19.897 rev
GLESOURCE 3.7V USB Rechargeable Battery (4 Pack) 2600mAh Lithium Ion Batteries Compatible for Streamlight SL-B26 Streamlight 22104
GLESOURCE$36.827 rev
Streamlight 78118 Lithium Ion Battery - Stinger 2020 S
Streamlight$38.048 rev
STRMLGHT STRION 2020 Battery
Streamlight$44.636 rev
STRMLGHT SLB2 Battery 2PK
Streamlight$18.445 rev
Trending
90-day click momentumGLESOURCE 3.7V USB Rechargeable Battery (2 Pack) 2600mAh Lithium Ion Batteries Compatible for Streamlight SL-B26 Streamlight 22104
GLESOURCE$19.894.1★
GLESOURCE 3.7V USB Rechargeable Battery (4 Pack) 2600mAh Lithium Ion Batteries Compatible for Streamlight SL-B26 Streamlight 22104
GLESOURCE$36.824.1★
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$27.804.7★
Kastar 1-Pack STL1870 Battery Replacement for Streamlight SL-B26 for ProTac HL-X HL 5-X 2L-X Flashlights 3.7V 2600mAh
Kastar$11.463.2★
STRMLGHT STRION 2020 Battery
Streamlight$44.634.8★
What buyers say about fenix battery
What buyers praise and complain about, mined from review topics.What buyers love
“Great flashlight battery”
“Good product”
“Worked on my streamlight,,333943 0722”
“Love the larger capacity works great”
“As described”
“Perfect for flashlights”
“Perfect fit and function”
“Cheaper replacement than the streamlight batteries”
What buyers complain about
“Wont charge”
“Is not even compatible with the flashlights that are listed”
“Note I cant comment on battery life etc as I just received it”
“The USB C plugs don't fit well”
“Will not sustain high output draw”
“Wrong parts included”
“Well that didnt last long”
“Not well made”
Top return reasons
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.