18650 battery
Worth a lookShows a thin review moat (92 avg reviews), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Review moat
Incredible92.13avg incumbent reviews — the moat a new listing must climb
Returns
Great1.4%return rate — above 5% kills the launch gate
Competition
Great39%top-5 click share — an open shelf
Quality gap
Great4.3★avg incumbent rating — lower means beatable quality
Avg price
Good£14.89avg listing price — sweet spot $15–$100
Price range
Good£7.86–£25.59cheapest to priciest tracked listing — scored on the share inside $15–$100
Market size
Good£384K£384K/yr · 569K searches
Conversion
Good4.5%search→purchase rate — share of searches ending in a sale
Brand share
Okay83%top-5 brand share — brands hold most of the demand
Growth
Bad-13.9%90-day search growth — must beat 0% to launch
According to Flapen's Amazon United Kingdom niche tracking, 18650 battery is a £384K/yr Amazon United Kingdom market (569K searches/yr). The top 5 brands hold 83% of demand. Verdict: Worth a look — 59/100.
Data updated Jul 22, 2026 · scored weekly · How we score niches
18650 battery market data
- Units sold / yr
- 20K–25K
- avg 750–1,000/product
- Revenue / yr
- £298K–£372K
- units × avg price
- Conversion rate
- 4.5%
- Avg BSR
- #73
- Page quality
- 0%
- Prime
- 94%
- Sponsored
- 81%
- Out of stock
- 3.6%
- Avg brand age
- 33 months
- Avg seller age
- 183 days
Competition & brand share
Clicks spread well past the top 5 (39% combined) — an open shelf where new products get seen.Brands
14 rising
Sellers
21
Top-5 brand share
83%
Top 20: 100%
Top-5 click share
39%
Top 20: 90%
Open market
13%
- JESSPOW30%
- Matbc21%
- Efest16%
- Generic11%
- POWOBEST5%
- REACELL4%
- Open — no brand owns it (8 brands, 13%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -13.9% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.5×
Top 18650 battery search terms
- 18650 battery221K/yr
- 18650 rechargeable battery122K/yr
- 1865043K/yr
- 3.7 volt rechargeable battery24K/yr
- 18650 lithium ion battery20K/yr
- 3.7v 18650 rechargeable batteries24K/yr
- 3.7v battery22K/yr
- 18650 batteries20K/yr
- 18650 battery flat top8K/yr
- efest 18650 batteries8K/yr
Top 18650 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 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Matbc 4 pack 3.7 V 18650 Rechargeable Battery Flat top with Charger 2800 mah 18650 battery For Outdoor Garden Lights headlamps Flashlight Small Fan
Matbc£18.394.3★302 rev
3.7V Rechargeable Battery 3300mAh Flat Top Rechargeable Batteries for Flashlight Headlamp (2 Pack 18 X 65mm)
JESSPOW£11.474.5★106 rev
Matbc 4 Pack 3.7 V 18650 Rechargeable Battery Flat top with Charger 18650 Lithium-ion Rechargeable Battery Set
Matbc£17.844.5★224 rev
EVE 30P - 3000mAh - 30A - 18650 Flat Top Type - Ultra High Performance Vape Suitable Rechargeable Battery Suitable for the most demanding applications + Storage Case
Generic£20.494.4★29 rev
![EFEST 3500 Rechargeable Battery 20A with Protective Case [Pack of 2]](https://m.media-amazon.com/images/I/41N7niQgEzL.jpg)
EFEST 3500 Rechargeable Battery 20A with Protective Case [Pack of 2]
Efest£18.684.7★92 rev
Newest
by launch date
3.7 Volt Rechargeable Battery 18650 Flat top 6 Pack 3300mAh Battery High Power Lasting Long for Headlamp LED Flashlight Electronic Devices etc
JESSPOW£22.6425 rev
3.7V Rechargeable Battery 3300mAh Flat Top Rechargeable Batteries for Flashlight Headlamp (2 Pack 18 X 65mm)
JESSPOW£11.9154 rev
3.7 Volt Rechargeable Battery Flat Top 4 Pack 3300mAh High Power Long Lasting 18650 Rechargeable Battery for Flashlight Camera Small Fan Outdoor Garden Lights
JESSPOW£18.5854 rev
3.7V Rechargeable Battery3300mAh Button Top Batteries High Power Lasting Long for Headlamp LED Flashlight 2 Pack 18 x 65mm
JESSPOW£11.7244 rev
![EFEST 3000 Rechargeable Battery with Protective Case [Single]](https://m.media-amazon.com/images/I/318Ytssn5RL.jpg)
EFEST 3000 Rechargeable Battery with Protective Case [Single]
Efest£7.860 rev
Trending
90-day click momentum
3.7V Rechargeable Battery Flat Top 2 Pack 3000mAh Long Lasting for Flashlight Camera Small Fan
TEKOWEE£10.574.3★
3.7 Volt Rechargeable Battery3300mAh High Power Long Lasting 18650 Rechargeable Battery for Flashlight Doorbell Headlamp 4 Pack 18 x 65mm
JESSPOW£18.774.2★
EFEST 3000 Rechargeable Battery with Protective Case [Single]
Efest£7.860.0★
3.7 Volt Rechargeable Battery 18650 Flat top 6 Pack 3300mAh Battery High Power Lasting Long for Headlamp LED Flashlight Electronic Devices etc
JESSPOW£22.644.6★
3.7 Volt Rechargeable Battery Flat Top 4 Pack 3300mAh High Power Long Lasting 18650 Rechargeable Battery for Flashlight Camera Small Fan Outdoor Garden Lights
JESSPOW£18.584.3★
What buyers say about 18650 battery
What buyers praise and complain about, mined from review topics.What buyers love
“good batteries and long lasting”
“Fast charge”
“Build quality feels solid”
“Excellent value for money”
“As advertised”
“Overall, they feel durable and reliable, and we have had no issues with them so far”
“They fit very snugly”
“Easy to use”
“Compact storage case – Keeps batteries organized and protected”
“It is a simple design”
What buyers complain about
“Very slow to charge”
“Dead Battery”
“Too small”
“Pricey for the manufacturing quality”
“not shown in the advert”
“Lasted 2 months, useless”
“Poor Value”
“Very poor cells”
“A small downside is that compatibility depends on the specific device”
“which has to be a design error”
Top return reasons
Common questions
- Is 18650 battery profitable to sell on Amazon United Kingdom?
- The niche generates £384K/yr across 32 tracked products. 9 of 19 products launched in the last 360 days are still selling. 90-day search growth is -13.9%. Flapen's verdict: Worth a look (59/100).
- How competitive is the 18650 battery niche?
- 14 brands and 21 sellers compete. The top 5 products take 39% of clicks and top 5 brands hold 83% of demand.
- What do buyers complain about in 18650 battery?
- Top complaints mined from reviews: Charging, Battery Life, Size-Overall. The return rate is 1.4%.
- When does demand for 18650 battery peak?
- Demand is steady year-round — the busiest month runs 1.5× the quietest.
- What does it cost to enter the 18650 battery niche?
- Listings span £7.86–£25.59; the average listing price is £14.89 (sweet spot $15–$100). The average incumbent carries 92 reviews — the moat a new listing must climb.