Is 3.7v lithium ion battery profitable to sell on Amazon United States?

The niche generates $37K/yr across 27 tracked products. 5 of 12 products launched in the last 360 days are still selling. 90-day search growth is +16.8%. Flapen's verdict: Worth a look (53/100).

How competitive is the 3.7v lithium ion battery niche?

19 brands and 48 sellers compete. The top 5 products take 52% of clicks and top 5 brands hold 75% of demand.

What do buyers complain about in 3.7v lithium ion battery?

Top complaints mined from reviews: Charging, Battery Life, Quality-Overall. The return rate is 2.1%.

When does demand for 3.7v lithium ion battery peak?

Demand peaks in Nov; the busiest month runs 1.7× the quietest.

What does it cost to enter the 3.7v lithium ion battery niche?

Listings span $6.86–$23.82; the average listing price is $14.96 (sweet spot $15–$100). The average incumbent carries 132 reviews — the moat a new listing must climb.

3.7v lithium ion battery

Worth a look

Shows a thin review moat (132 avg reviews), but a small market ($37K/yr) keeps it on the watch list.

Review moat

Great132.15

avg incumbent reviews — the moat a new listing must climb

Quality gap

Great4.3★

avg incumbent rating — lower means beatable quality

Avg price

Great$14.96

avg listing price — sweet spot $15–$100

Returns

Good2.1%

return rate — above 5% kills the launch gate

Competition

Good52%

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

Price range

Good$6.86–$23.82

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

Conversion

Good4.2%

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

Brand share

Okay75%

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

Growth

Okay+16.8%

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

Market size

Bad$37K

$37K/yr · 59K searches

According to Flapen's Amazon United States niche tracking, 3.7v lithium ion battery is a $37K/yr Amazon United States market (59K searches/yr). The top 5 brands hold 75% of demand. Demand peaks in Nov. Verdict: Worth a look — 53/100.

Data updated Jul 21, 2026 · scored weekly · How we score niches

3.7v lithium ion battery market data

Units sold / yr: 3K–4K; avg 100–250/product
Revenue / yr: $45K–$60K; units × avg price
Conversion rate: 4.2%
Avg BSR: #1,193
Page quality: 0%
Prime: 63%
Sponsored: 78%
Out of stock: 16.7%
Avg brand age: 28 months
Avg seller age: 193 days

Competition & brand share

The top 5 products take 52% of clicks — established leaders, but buyers still shop beyond them.

Brands

19 rising

Sellers

Top-5 brand share

75%

Top 20: 100%

Top-5 click share

52%

Top 20: 94%

Open market

20%

Generic36%
Renyqatt16%
WANGDAJIEDIAN12%
valuoso5%
QOJH5%
XINGHANTU4%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +16.8% search growth over the last 90 days.

Peak months: Nov · busiest ÷ quietest = 1.7×

Open Trend

Top 3.7v lithium ion battery search terms

icr18650 battery24K/yr -15.5%2.1% conv.
18650 1200mah 3.7v battery8K/yr +83.5%2.3% conv.
icr 18650 2200mah 3.7v 8.14wh battery5K/yr +56.5%4.3% conv.
18650 2000mah 3.7v battery5K/yr +74.5%1.3% conv.
icr18650 2000mah 3.7v battery7K/yr +20.5%1.6% conv.
2200mah 3.7v rechargeable battery5K/yr -0.5%3.2% conv.
18650 2000mah battery 3.7v li-ion rechargeable lithium batteries4K/yr +17.4%1.0% conv.
18650 li-ion battery 2000mah2K/yr +62.9%0.4% conv.

All search terms

Top 3.7v lithium 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★)2 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

3.7 USB Battery Charger with 2 Pack 3 7 2200mAh Button Top Battery Ni-MH 2 Bay LCD Display Smart Universal USB Battery Chargers for Flashlights Headlamps Doorbells RC Cars Outdoor Garden Lights etc

Generic$17.744.5★376 rev

18650 Battery Charger Suitable for Lithium Battery 18650 20700 10440 14500 18500 16340 17500 Battery Charger USB Single Slot li-ion Rechargeable Battery Charger (Battery not Included)

WANGDAJIEDIAN$6.864.4★887 rev

2 Pack 3200 mAh Battery Ni-MH Rechargeable Button Top NiMH Batteries High Capacity Battery for LED Flashlight Headlamp Camera RC Car Mini Fans etc with Storage Box Blue

Generic$14.064.0★40 rev

3.7 USB Battery Charger with 2 Pack 3 7 2200mAh Flat Top Battery Ni-MH 2 Bay LCD Display Smart Universal USB Battery Chargers for Flashlights Headlamps Doorbells RC Cars Outdoor Garden Lights etc

Generic$17.744.5★376 rev

Renyqatt 2 Pack Batteries 2600mAh Button Top Rechargeable Battery Ni-MH AA 2600mah Rechargeable Batteries for LED Flashlight Headlamps Doorbells RC Cars

Renyqatt$13.644.4★29 rev

Newest

by launch date

QOJH 2 Pack Ni-MH Battery 18650 Replacement Battery 1800mAh High Capacity Button Top for Flashlight Headlamp and RC Car etc

QOJH$15.495 rev

2mo ago

Svenirven Battery 2 Packs 3300mAh Button Top Battery Ni-MH Rechargeable Batteries for Headlamp LED Flashlight Electronic Devices etc (Blue)

Svenirven$15.831 rev

2mo ago

MLGBDC 18650 Rechargeable Battery 3.7Volt 2000mAh Li-ion Battery XH-2 Pin Plug with USB Charger Cable for Flashlights DIY Battery Pack Electric Toys Remote Control Cars etc

MLGBDC$17.682 rev

3mo ago

Betteryseler 1pc 3.7V 2600MAh ICR18650 Rechargeable Lithium ion Battery with JST XH 2.54 Plug for Croove Portable Voice Amplifier Replacement Battery (1x 18650 jst-XH 3.7v 9.62Wh/2.6Ah 1S1P) Blue

Betteryseler$12.720 rev

3mo ago

PQJDJDCNB 3.7 V 2000 MAh Li Large Capacity Portable Replacement 1200s Long Life Pack of 4pcs

PQJDJDCNB$21.290 rev

4mo ago

What buyers say about 3.7v lithium ion battery

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

What buyers love

Battery Life22%

“Battery works”

Charging20%

“Charging time was quick”

Advertised Vs Actual Product13%

“As advertised”

Value For Money9%

“Worth Buying”

Quality-Overall8%

“Good quality”

Size-Overall6%

“Fit was perfect”

Ease Of Use4%

“Easy to use”

Brightness/Shine/Glow3%

“the lamp is as bright as ever”

Functionality-Overall3%

“But it worked as planned”

Compatibility-Overall1%

“# compatability”

What buyers complain about

Charging30%

“The charger did not charge the battery”

Battery Life14%

“Slightly short battery”

Quality-Overall9%

“Absolute trash”

Functionality-Overall9%

“It didnt fix the problem”

Durability4%

“last ten times longer than these”

Size-Overall3%

“They do not fit what is described to fut”

Strength3%

“It's a bit flimsy”

Compatibility-Overall3%

“Battery doesn't work in the headlamp”

Value For Money2%

“Very cheap”

Defective Material/Parts2%

“Product did not work at all”

Top return reasons

Size-Overall29%

Charging23%

Compatibility-Overall13%

Functionality-Overall10%

Advertised Vs Actual Product7%

Defective Material/Parts3%

Battery Life3%

Socket/Port/Plug3%

Connectivity-Overall3%