21700 Battery
a small market ($26K/yr) — 21700 Battery doesn't clear our bar today.
Flapen Score
Is 21700 Battery profitable on Amazon?
According to Flapen's Amazon United Kingdom niche tracking, 21700 Battery is a £26K/yr Amazon United Kingdom market (65K searches/yr). The top 5 brands hold 96% of demand. Verdict: Skip it — 40/100.
21700 Battery: the Amazon niche in one read
Everything a seller checks before entering, in three answers.
Is the demand real?
Not really. Search demand moved -13.9% over the last 90 days and 2.8% of searches end in a purchase.
£26K
revenue / yr
Who owns the niche?
The top 5 brands hold 96% of demand, so 4% of the market is open.
4%
open market share
Is there a way in?
Listing quality. The average product page scores 0/100 on content standards. Incumbents average 3.9★ — the gap to enter on.
0/100
page quality · 11 products
Top 21700 Battery products & what they sell for
Every tracked product — its share of the shelf, its review moat, and what it sells for.
Top sellers
by 90-day click share
3.7 Volt Rechargeable Batteries 5000mAh High Capacity Flat Top Battery for Flashlights Headlamps (Pack of 221 X 70mm)
- Price
- £15.15
- Rating
- 4.1/5
- Reviews
- 25
- Age
- 6mo ago
Molicel P42A 4200 mAh 45A Size: 21.7K High Amp Flat Top Battery No Nicotine
- Price
- £17.83
- Rating
- 4.0/5
- Reviews
- 81
- Age
- 2y ago
P42A 21/700 4000mah Rechargable Compatible With Vapcell Products - For E-Cigarette Ecig Vape Mods/Kits + 10ml Nightmare Juice Nicotine Free (2 Pack)
- Price
- £16.46
- Rating
- 2.5/5
- Reviews
- 5
- Age
- 1y ago
21/700 6000mAh Highest MAH Red Compatible With Fogstar Energy Works 10A Rechargeable Cell With Sub Ohm Kit No Nicotine + Band (2 PACK)
- Price
- £20.40
- Rating
- 3.0/5
- Reviews
- 2
- Age
- 8mo ago
4000mAh Green 217/00 Compatible With Fogstar Energy Works With Sub Ohm Kit + Band No Nicotine (2 Pack)
- Price
- £16.47
- Rating
- 4.1/5
- Reviews
- 32
- Age
- 1y ago
Trending
90-day click momentum![Voopoo Argus XT Vape Kit [Silver Grey] - Available in 5 colours - 3A Fast Charge 18650/21700 Battery (SOLD SEPARATELY) 100W - Compatible with MAAT Tanks & TPP Coils - No Nicotine](https://m.media-amazon.com/images/I/41Mn0NNDUzL.jpg)
Voopoo Argus XT Vape Kit [Silver Grey] - Available in 5 colours - 3A Fast Charge 18650/21700 Battery (SOLD SEPARATELY) 100W - Compatible with MAAT Tanks & TPP Coils - No Nicotine
- Price
- £16.36
- Rating
- 3.6/5
- Reviews
- 55
- Age
- 5mo ago
3.7 Volt Rechargeable Batteries 5000mAh High Capacity Flat Top Battery for Flashlights Headlamps (Pack of 221 X 70mm)
- Price
- £15.15
- Rating
- 4.1/5
- Reviews
- 25
- Age
- 6mo ago
![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]
- Price
- £7.86
- Rating
- 0.0/5
- Reviews
- 0
- Age
- 6mo ago
![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]
- Price
- £18.68
- Rating
- 4.7/5
- Reviews
- 92
- Age
- 10mo ago
![EFEST 3000 Rechargeable Battery with Protective Case [Pack of 2]](https://m.media-amazon.com/images/I/41z-pwt691L.jpg)
EFEST 3000 Rechargeable Battery with Protective Case [Pack of 2]
- Price
- £15.31
- Rating
- 3.5/5
- Reviews
- 8
- Age
- 1y ago
Newest
by launch dateVoopoo Argus XT Vape Kit [Silver Grey] - Available in 5 colours - 3A Fast Charge 18650/21700 Battery (SOLD SEPARATELY) 100W - Compatible with MAAT Tanks & TPP Coils - No Nicotine
- Price
- £16.36
- Rating
- 3.6/5
- Reviews
- 55
- Age
- 5mo ago
EFEST 3000 Rechargeable Battery with Protective Case [Single]
- Price
- £7.86
- Rating
- 0.0/5
- Reviews
- 0
- Age
- 6mo ago
3.7 Volt Rechargeable Batteries 5000mAh High Capacity Flat Top Battery for Flashlights Headlamps (Pack of 221 X 70mm)
- Price
- £15.15
- Rating
- 4.1/5
- Reviews
- 25
- Age
- 6mo ago
VENNERLI Rechargeable Lithium Batteries with USB-C Cable Fast Charging Battery 3.7V 7400mWh High-Capacity 2000+ Cycles Ultra-Long Lasting Time Durable Cycle Smart Charging LED Indicator (2-Pack Set)
- Price
- £13.03
- Rating
- 4.7/5
- Reviews
- 36
- Age
- 7mo ago
21/700 6000mAh Highest MAH Red Compatible With Fogstar Energy Works 10A Rechargeable Cell With Sub Ohm Kit No Nicotine + Band (2 PACK)
- Price
- £20.40
- Rating
- 3.0/5
- Reviews
- 2
- Age
- 8mo ago
Competition: brands, sellers & click share
The top 5 products capture 78% of clicks — a locked-up shelf that new listings rarely crack.
Brands
7 falling
Sellers
11
Top-5 brand share
96%
Top 20: 100%
Top-5 click share
78%
Top 20: 100%
Open market
1%
- Global Rankings31%
- JESSPOW27%
- VOOPOO19%
- Efest12%
- VENNERLI6%
- fenix3%
- Open — no brand owns it (1 brand, 1%)
21700 Battery demand & seasonality
Weekly search volume, with the niche's key stats alongside.
No pronounced peak months · busiest ÷ quietest = 1.4×
Top 21700 Battery search terms shoppers use
The exact queries shoppers type, with yearly volume, growth and conversion.
- 21700 battery50K/yr
- 21700 vaping battery6K/yr
- 217005K/yr
- 21700 battery 5000mah4K/yr
What reviews say buyers love and hate about 21700 Battery
What buyers mention most, as a share of all reviews.
What buyers love
83% of reviews“Great batteries”
“Brilliant Charger”
“Good quality”
“great value for money”
“The brand highlights durability”
What buyers complain about
54% of reviews“will not charge”
“they are an odd size”
“cost a fortune in different batteries”
“This should really be stated clearly in the listing to avoid confusion”
“Not as good in capacity as the normal ones”
21700 Battery return rate & reasons
Why buyers send it back, as a share of all return requests.
1.0%
Return rate
64%
Fixable by listing
The "fixable" share counts expectation-mismatch reasons — size, look, advertised-vs-actual — that better copy and images address.
Common 21700 Battery questions
The questions sellers ask about this niche, answered from the tracked metrics.
Related niches
Same-category niches scoring near this one — the next ones worth researching.
Best Flapen score
The highest-scoring niches we track right now, across every category.
