Is 18500 rechargeable li-ion battery profitable to sell on Amazon United States?

The niche generates $21K/yr across 25 tracked products. 1 of 12 products launched in the last 360 days are still selling. 90-day search growth is +19.4%. Flapen's verdict: Worth a look (51/100).

How competitive is the 18500 rechargeable li-ion battery niche?

20 brands and 42 sellers compete. The top 5 products take 54% of clicks and top 5 brands hold 63% of demand.

What do buyers complain about in 18500 rechargeable li-ion battery?

Top complaints mined from reviews: Charging, Battery Life, Size-Overall. The return rate is 1.5%.

When does demand for 18500 rechargeable li-ion battery peak?

Demand is steady year-round — the busiest month runs 1.8× the quietest.

What does it cost to enter the 18500 rechargeable li-ion battery niche?

Listings span $6.31–$34.08; the average listing price is $15.74 (sweet spot $15–$100). The average incumbent carries 206 reviews — the moat a new listing must climb.

18500 rechargeable li-ion battery

Worth a look

Shows a thin review moat (206 avg reviews), but a small market ($21K/yr) keeps it on the watch list.

Review moat

Great206.08

avg incumbent reviews — the moat a new listing must climb

Returns

Great1.5%

return rate — above 5% kills the launch gate

Avg price

Great$15.74

avg listing price — sweet spot $15–$100

Brand share

Good63%

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

Price range

Good$6.31–$34.08

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

Competition

Good54%

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

Growth

Okay+19.4%

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

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Conversion

Okay2.0%

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

Market size

Bad$21K

$21K/yr · 68K searches

Signals Low Review Barrier Out of Stock

According to Flapen's Amazon United States niche tracking, 18500 rechargeable li-ion battery is a $21K/yr Amazon United States market (68K searches/yr). The top 5 brands hold 63% of demand. Verdict: Worth a look — 51/100.

Data updated Jul 22, 2026 · scored weekly · How we score niches

18500 rechargeable li-ion battery market data

Units sold / yr: 3K–4K; avg 0–100/product
Revenue / yr: $47K–$63K; units × avg price
Conversion rate: 2.0%
Avg BSR: #72
Page quality: 0%
Prime: 72%
Sponsored: 80%
Out of stock: 15.6%
Avg brand age: 29 months
Avg seller age: 188 days

Competition & brand share

The top 5 products take 54% of clicks — established leaders, but buyers still shop beyond them.

Brands

Sellers

Top-5 brand share

63%

Top 20: 100%

Top-5 click share

54%

Top 20: 94%

Open market

32%

TapePlayers21%
Generic17%
Imren11%
Swanlake8%
RGYDFTYGH5%
Cameron Sino5%

Demand & seasonality

Weekly Amazon search volume, last 101 weeks — +19.4% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.8×

Open Trend

Top 18500 rechargeable li-ion battery search terms

18500 battery23K/yr +46.9%0.6% conv.
18500 rechargeable battery31K/yr -0.3%0.6% conv.
li-ion 18500 3.7v 1400mah rechargeable battery4K/yr +56.4%0.4% conv.
18500 3.7v 1400mah lithium ion rechargeable battery5K/yr -8.4%0.5% conv.
185004K/yr +19.1%0.5% conv.

All search terms

Top 18500 rechargeable li-ion 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)4 products missing review or click data not plotted

All 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

TapePlayers Powerplay Battery 18500 18490 2400mAh 3.7V Rechargable Li-ion Batteries for ImmersionRC FPV DVR 2-Pack (2-Pack)

TapePlayers$12.385.0★1 rev

IMREN 18650 Battery Charger 21700 Battery Charger for 3.7V 14500 10400 18500 18350 18650 18700 20700 21700 22650 26650 Li-ion Battery 1.2V Ni-MH/Ni-Cd Battery 4 Bay 18650 USB C Charger

Imren$19.814.6★1,581 rev

18650 Battery Charger LCD Display Charger for 3.7V Li-ion Battery 18650 26650 21700 18500 18350 16650 1.2V LiFePO4 Ni-MH Ni-Cd A AA AAA Rechargeable Batteries(Battery not Included)

Swanlake$12.994.6★207 rev

1 Pack Battery Case Set with 2 Pack 3 7 Button Top 2200mAh Battery Rechargeable Ni-MH Batteries NiMH 1000+ Cycles for Headlamp Flashlight Camera Small Fan Outdoor Garden Light White

Generic$14.654.0★11 rev

RGYDFTYGH 4 Pack 3.2V 18500 top 800mAh Rechargeable Battery Set Batteries for s Headlamps Fans Digital Cameras Toys s Speakers Surveillance Devices

RGYDFTYGH$27.630.0★0 rev

Newest

by launch date

JESSY Rechargeable Battery case Set 3.2V JSY18500 for Outdoor Solar Lights Garden Solar Lights (2 Pack)

JESSY$15.760 rev

today

TapePlayers Powerplay Battery 18500 18490 2400mAh 3.7V Rechargable Li-ion Batteries for ImmersionRC FPV DVR 2-Pack (2-Pack)

TapePlayers$12.381 rev

1mo ago

18650 Battery Charger Fast Charging Universal Rechargeable Batteries Charger for 3.7V Li-ion IMR INR ICR 21750 21700 10340 17335 17670 18500 18700 20700 26650 1.2V Ni-MH/CD AAA/AA C SC (2 Bay)

UPUNAIS$13.2931 rev

3mo ago

Smart 18650 Battery Charger Universal Charger with LCD Display for Rechargeable 14500 18500 18650 18700 20700 21700 22650 26650 1.2V Ni-MH/Ni-Cd AA AAA C (Batteries not Included)

AOJEE$10.9911 rev

3mo ago

2-Slot 18650 Battery Charger Set 4pcs 3400mAh Button Top Universal 3.7V Li-ion Batteries Charger for 18650 26650 18500 16650 14500(No Suitable for nimh & Other 1.5V Batteries)

Sinyeeho$24.7617 rev

4mo ago

What buyers say about 18500 rechargeable li-ion battery

What buyers praise and complain about, mined from review topics.

What buyers love

Charging27%

“Charges good”

Battery Life19%

“Batteries work well”

Advertised Vs Actual Product11%

“As advertised”

Quality-Overall11%

“Solid build quality”

Value For Money9%

“Worth Buying”

Ease Of Use4%

“Easy to use”

Efficiency2%

“Works great”

Size-Overall2%

“I really like the compact size”

Brightness/Shine/Glow1%

“the lantern was even brighter”

Portability1%

“Versatile, Portable and Sophisticated Charger”

What buyers complain about

Charging30%

“Would not charge”

Battery Life10%

“Rechargeable battery not working at all”

Size-Overall8%

“is just slightly smaller”

Functionality-Overall7%

“Did not work”

Value For Money6%

“OVERPRICED”

Quality-Overall5%

“Cheap”

Compatibility-Overall3%

“Battery doesn't work in the headlamp”

Connectivity-Overall2%

“itll just turn off because it loses connection”

Advertised Vs Actual Product2%

“Fake ad”

Instructions/User Manual/Troubleshooting2%

“No manual or instructions included”

Top return reasons

Charging28%

Size-Overall28%

Advertised Vs Actual Product9%

Compatibility-Overall8%

Functionality-Overall8%

Battery Life4%

Defective Material/Parts3%

Socket/Port/Plug3%