Is 321 watch battery profitable to sell on Amazon United States?

The niche generates $155K/yr across 13 tracked products. 90-day search growth is +7.9%. Flapen's verdict: Skip it (41/100).

How competitive is the 321 watch battery niche?

7 brands and 32 sellers compete. The top 5 products take 66% of clicks and top 5 brands hold 92% of demand.

What do buyers complain about in 321 watch battery?

Top complaints mined from reviews: Battery Life, Durability, Functionality-Overall. The return rate is 0.2%.

When does demand for 321 watch battery peak?

Demand is steady year-round — the busiest month runs 1.2× the quietest.

What does it cost to enter the 321 watch battery niche?

Listings span $3.47–$8.17; the average listing price is $5.87 (sweet spot $15–$100). The average incumbent carries 20,559 reviews — the moat a new listing must climb.

321 watch battery

Skip it

Prices mostly outside the sweet spot ($3.47–$8.17) — this niche doesn't clear our bar today.

Conversion

Incredible25.3%

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

Returns

Incredible0.2%

return rate — above 5% kills the launch gate

Growth

Okay+7.9%

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

Market size

Okay$155K

$155K/yr · 104K searches

Competition

Okay66%

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

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Brand share

Bad92%

top-5 brand share — brand-locked demand

Review moat

Bad20,558.92

avg incumbent reviews — the moat a new listing must climb

Avg price

Bad$5.87

avg listing price — sweet spot $15–$100

Price range

Bad$3.47–$8.17

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

According to Flapen's Amazon United States niche tracking, 321 watch battery is a $155K/yr Amazon United States market (104K searches/yr). The top 5 brands hold 92% of demand. Verdict: Skip it — 41/100.

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

321 watch battery market data

Units sold / yr: 20K–25K; avg 1,250–1,500/product
Revenue / yr: $117K–$147K; units × avg price
Conversion rate: 25.3%
Avg BSR: #433
Page quality: 0%
Prime: 85%
Sponsored: 38%
Out of stock: 0.9%
Avg brand age: 70 months
Avg seller age: 170 days

Competition & brand share

The top 5 products take 66% of clicks — established leaders, but buyers still shop beyond them.

Brands

7 rising

Sellers

Top-5 brand share

92%

Top 20: 100%

Top-5 click share

66%

Top 20: 100%

Open market

Energizer38%
Renata32%
UOGTNON10%
Amazon Basics6%
Murata6%
SKOANBE5%
Open — no brand owns it (1 brand, 3%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +7.9% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.2×

Open Trend

Top 321 watch battery search terms

321 watch battery38K/yr +7.4%24.7% conv.
sr616sw watch battery21K/yr +5.5%23.1% conv.
watch battery 32110K/yr +16.4%21.8% conv.
sr616sw8K/yr +21.6%20.1% conv.
3217K/yr +2.1%1.3% conv.
321 battery7K/yr +8.8%21.9% conv.
renata 321 watch battery5K/yr +18.9%26.5% conv.
battery 3213K/yr -8.1%25.4% conv.
energizer 321 watch battery3K/yr +6.3%35.7% conv.
sr616sw battery3K/yr -16.1%21.3% conv.

All search terms

Top 321 watch 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 13 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

5 321 Energizer Watch Batteries SR616SW Battery Cell (5 Batteries Per Pack)

Energizer$7.834.7★3,601 rev

Renata Watch Battery 321 0%Hg Mercury Free X 3

Renata$5.514.6★1,841 rev

Energizer 321 SR616SW Silver Oxide 5 Count (Pack of 1)

Energizer$7.634.7★764 rev

UOGTNON 321 SR616SW Watch Battery 1.5V Button Cell (10-Pack)

UOGTNON$7.384.7★1,312 rev

Renata 321 SR616SW Batteries - 1.55V Silver Oxide 321 Watch Battery (2 Count)

Renata$3.504.8★384 rev

Newest

by launch date

Renata 321 SR616SW Batteries - 1.55V Silver Oxide 321 Watch Battery (2 Count)

Renata$3.50384 rev

4y ago

KaPonsec 321 SR616SW 1.5V Silver Oxide Watch Battery (10-Pack)

KaPonsec$6.9867 rev

4y ago

SKOANBE 321 SR616SW 1.5V Watch Battery Button Cell (10-Pack)

SKOANBE$8.17313 rev

5y ago

Murata 321 Battery SR616SW 1.55V Silver Oxide Watch Button Cell (5 Batteries)

Murata$5.971,000 rev

6y ago

UOGTNON 321 SR616SW Watch Battery 1.5V Button Cell (10-Pack)

UOGTNON$7.381,312 rev

6y ago

What buyers say about 321 watch battery

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

What buyers love

Value For Money27%

“Great Deal”

Battery Life22%

“good battery's”

Quality-Overall16%

“Excellent product”

Advertised Vs Actual Product12%

“Item arrived as described”

Size-Overall6%

“In this case they were a perfect fit”

Efficiency4%

“Gets the job done”

Compatibility-Overall3%

“Works perfectly in small electronics”

Durability2%

“Long lasting & easy to use”

Ease Of Use1%

“Useful”

Charging1%

“Fully charged”

What buyers complain about

Battery Life42%

“Bad batteries”

Durability15%

“Don't last”

Functionality-Overall7%

“Does not work properly at all”

Quality-Overall6%

“Poor performance Air Tags”

Charging4%

“message follows the battery so definitely poor charge”

Size-Overall3%

“thus won't fit”

Compatibility-Overall3%

“Won't fine in my bs monitor”

Thickness3%

“These batteries are not even the same thickness as my old batteries”

Ease Of Use2%

“it's really, really difficult to get them out of the packaging”

Value For Money2%

“Cheap”

Top return reasons

Size-Overall52%

Compatibility-Overall12%

Value For Money11%

Functionality-Overall8%

Battery Life7%

Advertised Vs Actual Product5%

Durability1%