21700 Battery
FailShoppers spend an estimated $26K a year here, so 21700 Battery is a Fail.
- Flapen Score
- 40 / 100Ranks 975 of 1,488 Electronics & Photo niches · −4 vs the category median of 4440
- Market size
- £26K/yr65K searches / yr
- 90-day growth
- -13.9%search demand this quarter
- Competition
- 78%top-5 click share · 7 brands · 11 sellers
Flapen Score
21700 Battery against its category
The dotted line is the Electronics & Photo average. Past it, 21700 Battery is stronger. Inside it, weaker.
Market
The 21700 Battery market on Amazon at a glance
Shoppers on Amazon United Kingdom searched for 21700 Battery 65K times last year and spent an estimated £26K. The top 5 brands take 96% of clicks. Flapen scores it 40 out of 100, a Fail.
01 · Demand
An estimated 2.8% of those searches ended in a purchase.
Shoppers searched for this 65K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. An estimated 2.8% of those searches ended in a purchase. Searches in the last 90 days moved -13.9% against the 90 days before. Searches, conversion and average price together put the market at an estimated £26K a year.
- Searches, last 12 months
- 65K
- Growth, 90 days vs prior 90
- -13.9%
- Conversion, latest week
- 2.8%
- Market size, estimated
- £26Ka year
- Peak month
- January1.4× the quietest month
- Top search term
- 21700 battery50K searches a year
02 · Price
A sale here is worth £14.80.
Listings sell for £14.80 on average, from £5.23 to £20.40. Amazon reports units sold in ranges. This niche sold 3K to 3K a year. The average listing sells 100 to 250 of them. At £14.80 that is £1K to £4K a year per listing.
- Average price
- £14.80under the $15 to $100 sweet spot
- Price range
- £5.23–£20.40
- Amazon United Kingdom median price
- £12.12across 27,606 niches
- Units sold a year
- 3K–3K
- Units per listing a year
- 100–250
- Revenue per listing a year
- £1K–£4K
- Returns
- 1.0%of orders · Amazon United Kingdom median 0.6%
03 · Entry bar
The bar here is low.
27% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 10.8% of listings are out of stock. The average listing ranks #116 within E-Cigarettes, E-Shisha & Heat-Not-Burn. It carries 41 reviews at 3.86 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 27%
- Prime listings
- 100%
- Out of stock, average day
- 10.8%
- Average rank
- #116in E-Cigarettes, E-Shisha & Heat-Not-Burn
- Average rating
- 3.86 starsAmazon United Kingdom average 4.36 stars
- Average reviews
- 41per listing
- Listings tracked
- 11
04 · Newcomers
3 of last year's 6 launches cleared the first-year sales bar.
6 products launched here in the last 12 months. 3 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 27 months on average, so a newcomer is not facing entrenched names.
- Launched, last 12 months
- 6
- Successful launches
- 3Amazon's first-year sales bar
- Average brand age
- 27 months
Products
Top 21700 Battery products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 22, 2026. The live listing can differ.
Top sellers
by estimated 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
estimated 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 date![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
![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

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
Competition: brands, sellers & click share
The top 5 products take an estimated 78% of clicks. A locked shelf that new listings rarely crack.
Brands
7 falling
Sellers
11
Est. top-5 brand share
96%
Top 20: 100%
Est. 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%)
Demand
21700 Battery search demand
Weekly searches over the year, seasonality beneath. Pick a range.
No pronounced peak months · busiest ÷ quietest = 1.4×
Search terms
Top 21700 Battery search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- 21700 battery50K/yr
- 21700 vaping battery6K/yr
- 217005K/yr
- 21700 battery 5000mah4K/yr
Reviews and returns
What reviews say buyers love and hate about 21700 Battery
We read the reviews and the return reasons for every product selling here.
“will not charge”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
17 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common 21700 Battery questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









