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21700 Battery

Fail

Shoppers spend an estimated $26K a year here, so 21700 Battery is a Fail.

Flapen Score
40
40 / 100
Ranks 975 of 1,488 Electronics & Photo niches · −4 vs the category median of 44
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.

40Fail
Big MarketTrendingHigh ConversionOpen MarketLow ReturnsPrice rangeAvg priceNo Dominant BrandLow Review BarrierQuality Gap
This niche Category average

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.

Competition

Competition: brands, sellers & click share

The top 5 products take an estimated 78% of clicks. A locked shelf that new listings rarely crack.

£0£3K£5K£8K£11K1101001K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)1 product missing review or click data not plotted

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.

2K1KHoliday '24Spike '25Black Friday '25Spike '26SepDecMarJunAugNovMarMay

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.

24%of positive reviews mention “Battery Life”
14%of negative reviews mention “Charging”
1.0%of orders come back
“will not charge”
A buyer, on “Charging”14% of negative reviews mention the same topic

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

NegativePositive

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