---
title: "Trend — 21700 battery charger - Flapen"
canonical_url: "https://flapen.com/research/us/automotive/21700-battery-charger/trend"
last_updated: "2026-08-09T11:00:15.424Z"
locale: en
meta:
  description: "Niche score 49/100 · $183K/yr market · 90K searches/yr · $30.94 avg price. Doesn't clear our bar today. Data updated Jul 2026."
  "og:description": "Niche score 49/100 · $183K/yr market · 90K searches/yr · $30.94 avg price. Doesn't clear our bar today. Data updated Jul 2026."
  "og:title": "Trend — 21700 battery charger - Flapen"
---

# **21700 battery charger**

**Skip it**

Soft demand (-23.4% this quarter) — this niche doesn't clear our bar today.

Market size 37Growth 13Conversion 71Competition 36Returns 81Price range 90Avg price 95Brand share 27Review moat 72Quality gap 52

**Avg price**

**Incredible****$30.94**

avg listing price — sweet spot $15–$100

**Price range**

**Great****$9.82–$98.38**

cheapest to priciest tracked listing — scored on the share inside $15–$100

**Returns**

**Great****1.7%**

return rate — above 5% kills the launch gate

**Review moat**

**Good****610.36**

avg incumbent reviews — the moat a new listing must climb

**Conversion**

**Good****6.6%**

search→purchase rate — share of searches ending in a sale

**Quality gap**

**Good****4.4★**

avg incumbent rating — lower means beatable quality

**Market size**

**Okay****$183K**

$183K/yr · 90K searches

**Competition**

**Okay****63%**

top-5 click share — leaders hold, buyers still browse

**Brand share**

**Okay****89%**

top-5 brand share — brands hold most of the demand

**Growth**

**Bad****-23.4%**

90-day search growth — must beat 0% to launch

## Trend