Is panasonic mt621 battery profitable to sell on Amazon United States?

The niche generates $95K/yr across 18 tracked products. 0 of 6 products launched in the last 360 days are still selling. 90-day search growth is -18.8%. Flapen's verdict: Skip it (48/100).

How competitive is the panasonic mt621 battery niche?

13 brands and 16 sellers compete. The top 5 products take 64% of clicks and top 5 brands hold 71% of demand.

What do buyers complain about in panasonic mt621 battery?

Top complaints mined from reviews: Battery Life, Charging, Value For Money. The return rate is 3.7%.

When does demand for panasonic mt621 battery peak?

Demand peaks in Oct–Nov; the busiest month runs 2.7× the quietest.

What does it cost to enter the panasonic mt621 battery niche?

Listings span $10.51–$27.67; the average listing price is $17.82 (sweet spot $15–$100). The average incumbent carries 42 reviews — the moat a new listing must climb.

panasonic mt621 battery

Skip it

Soft demand (-18.8% this quarter) — this niche doesn't clear our bar today.

Review moat

Incredible41.78

avg incumbent reviews — the moat a new listing must climb

Conversion

Great10.7%

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

Avg price

Great$17.82

avg listing price — sweet spot $15–$100

Price range

Good$10.51–$27.67

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

Brand share

Good71%

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

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Returns

Okay3.7%

return rate — above 5% kills the launch gate

Competition

Okay64%

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

Market size

Bad$95K

$95K/yr · 50K searches

Growth

Bad-18.8%

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

Signals Low Review Barrier

According to Flapen's Amazon United States niche tracking, panasonic mt621 battery is a $95K/yr Amazon United States market (50K searches/yr). The top 5 brands hold 71% of demand. Demand peaks in Oct–Nov. Verdict: Skip it — 48/100.

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

panasonic mt621 battery market data

Units sold / yr: 5K–6K; avg 250–500/product
Revenue / yr: $89K–$107K; units × avg price
Conversion rate: 10.7%
Avg BSR: #2,014
Page quality: 0%
Prime: 89%
Sponsored: 94%
Out of stock: 5.0%
Avg brand age: 51 months
Avg seller age: 181 days

Competition & brand share

The top 5 products take 64% of clicks — established leaders, but buyers still shop beyond them.

Brands

13 falling

Sellers

Top-5 brand share

71%

Top 20: 100%

Top-5 click share

64%

Top 20: 100%

Open market

23%

LeeCrynoid29%
EXMUMCMR12%
HamnaKhu10%
YUFEEI10%
Fwioaor9%
Nzzz7%

Demand & seasonality

Weekly Amazon search volume, last 82 weeks — -18.8% search growth over the last 90 days.

Peak months: Oct, Nov · busiest ÷ quietest = 2.7×

Open Trend

Top panasonic mt621 battery search terms

mt621 watch battery10K/yr -8.3%14.3% conv.
panasonic mt621 battery8K/yr -14.1%10.8% conv.
citizen eco drive battery7K/yr -26.6%2.2% conv.
mt621 watch battery citizen7K/yr -30.9%13.4% conv.
citizen eco drive battery replacement5K/yr -24.2%2.1% conv.
mt6214K/yr -11.2%10.8% conv.
panasonic mt6214K/yr -18.4%11.3% conv.
mt621 battery3K/yr -17.7%10.3% conv.
panasonic mt621 watch battery3K/yr -31.7%13.7% conv.

All search terms

Top panasonic mt621 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★)

All 18 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

LeeCrynoid 295-5100 MT621 Rechargeable Battery for Citizen Eco-Drive Watches Compatible with 295-51 and MT621 Sealed Capacitor

LeeCrynoid$17.664.3★136 rev

EXMUMCMR 295-5100 Battery Compatible with Panasonic Battery for Replacement for Citizen Eco Drive Watch Capacitor 295-5100 MT621 BP10 E000 E001 E010 E011

EXMUMCMR$17.284.4★93 rev

Fwioaor 295-5100 Rechargeable Battery Capacitor for Citizen Eco-Drive 295-5 MT621 Compatible with Citizen Eco-Drive 295-51 295-5100 and MT621 Models

Fwioaor$18.264.5★60 rev

HamnaKhu Rechargeable 295-5100 MT621 Battery for Citizen Eco-Drive Watches Compatible with Citizen Eco-Drive 295-51 295-5100 MT621

HamnaKhu$18.434.2★64 rev

Nzzz 295-5100 MT621 Rechargeable Battery for Citizen Eco-Drive Watches Compatible with 295-51/295-5100 BP10 E000 E001 E010 E011 Watch Capacitor & Panasonic Battery NiMH

Nzzz$15.874.8★12 rev

Newest

by launch date

HUAENG Battery for Citizen Eco-Drive 295-51 295-5100 MT621 Compatible with Panasonic Battery for Replacement for Citizen Eco Drive Watch BP10 E010 E000 E001 E011

HUAENG$17.2611 rev

3mo ago

YUFEEI 295-5100 Watch Battery Compatible with Citizen Eco-Drive 295-5100 MT621 Fits BP10 E000 E001 E010 E011 Sealed Capacitor Rechargeable Battery (295-5100 Battery)

YUFEEI$10.511 rev

3mo ago

LeeCrynoid 295-5100 / MT621 Battery for Citizen Eco-Drive Watches 295-51 Sealed Capacitor Compatible with Models 5700 A100 B110 & More

LeeCrynoid$17.408 rev

7mo ago

YUFEEI 295-5100 Watch Battery Compatible with Citizen Eco-Drive 295-5100 MT621 Fits BP10 E000 E001 E010 E011 Sealed Capacitor Rechargeable Battery

YUFEEI$17.7055 rev

7mo ago

Nzzz 295-5100 MT621 Rechargeable Battery for Citizen Eco-Drive Watches Compatible with 295-51/295-5100 BP10 E000 E001 E010 E011 Watch Capacitor & Panasonic Battery NiMH

Nzzz$15.8712 rev

10mo ago

What buyers say about panasonic mt621 battery

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

What buyers love

Battery Life19%

“the battery looks good for the long haul”

Size-Overall13%

“Perfect fit”

Value For Money13%

“Great product at a great price”

Quality-Overall12%

“Good quality”

Advertised Vs Actual Product9%

“worked as it should”

Assembly/Installation8%

“Careful Installation”

Ease Of Use7%

“Worked like a charm, easy peasy”

Efficiency4%

“Works perfectly”

Watch Mechanism2%

“Fits perfectly watch run for more than 1/2 hour now”

Charging2%

“Holding a charge”

What buyers complain about

Battery Life29%

“Was a bad battery”

Charging15%

“would not charge”

Value For Money8%

“Pretty expensive to find out it doesnt work”

Quality-Overall8%

“Poor quality”

Assembly/Installation7%

“Installation does require extra tools that don't come with the battery”

Watch Mechanism4%

“My watch didn't work, I popped this new one in and it did”

Functionality-Overall4%

“Did not work”

Durability2%

“quits again very quickly”

Defective Material/Parts2%

“Little gold piece that is attached to battery came off”

Size-Overall1%

“The whole product is very small”

Top return reasons

Size-Overall29%

Functionality-Overall18%

Charging14%

Battery Life13%

Defective Material/Parts5%

Compatibility-Overall5%

Value For Money3%

Advertised Vs Actual Product3%