Is iphone 8 plus battery case profitable to sell on Amazon United States?

The niche generates $26K/yr across 6 tracked products. 90-day search growth is -30.7%. Flapen's verdict: Skip it (38/100).

How competitive is the iphone 8 plus battery case niche?

6 brands and 7 sellers compete. The top 5 products take 96% of clicks and top 5 brands hold 96% of demand.

What do buyers complain about in iphone 8 plus battery case?

Top complaints mined from reviews: Durability, Quality-Overall, Charging. The return rate is 4.1%.

When does demand for iphone 8 plus battery case peak?

Demand peaks in Jul–Aug–Dec; the busiest month runs 2.0× the quietest.

What does it cost to enter the iphone 8 plus battery case niche?

Listings span $10.00–$36.04; the average listing price is $22.34 (sweet spot $15–$100). The average incumbent carries 913 reviews — the moat a new listing must climb.

iphone 8 plus battery case

Skip it

A concentrated shelf (top 5 take 96% of clicks) — this niche doesn't clear our bar today.

Conversion

Incredible12.0%

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

Quality gap

Great4.0★

avg incumbent rating — lower means beatable quality

Avg price

Great$22.34

avg listing price — sweet spot $15–$100

Price range

Great$10.00–$36.04

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

Review moat

Good912.5

avg incumbent reviews — the moat a new listing must climb

Returns

Okay4.1%

return rate — above 5% kills the launch gate

Growth

Bad-30.7%

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

Brand share

Bad96%

top-5 brand share — brand-locked demand

Market size

Bad$26K

$26K/yr · 10K searches

Competition

Bad96%

top-5 click share — a locked-up shelf

According to Flapen's Amazon United States niche tracking, iphone 8 plus battery case is a $26K/yr Amazon United States market (10K searches/yr). The top 5 brands hold 96% of demand. Demand peaks in Jul–Aug–Dec. Verdict: Skip it — 38/100.

Data updated Jul 6, 2026 · scored weekly · How we score niches

iphone 8 plus battery case market data

Units sold / yr: 250–500; avg 0–100/product
Revenue / yr: $6K–$11K; units × avg price
Conversion rate: 12.0%
Avg BSR: #422
Page quality: 0%
Prime: 100%
Sponsored: 83%
Out of stock: 24.8%
Avg brand age: 52 months
Avg seller age: 182 days

Competition & brand share

The top 5 products capture 96% of clicks — a locked-up shelf that new listings rarely crack.

Brands

6 flat

Sellers

Top-5 brand share

96%

Top 20: 100%

Top-5 click share

96%

Top 20: 100%

Open market

Trswyop29%
YINGYKJ28%
QTshine23%
Loytal12%
SlaBao4%
DUEDUE4%
Open — no brand owns it (0%)

Demand & seasonality

Weekly Amazon search volume, last 101 weeks — -30.7% search growth over the last 90 days.

Peak months: Jul, Aug, Dec · busiest ÷ quietest = 2.0×

Open Trend

Top iphone 8 plus battery case search terms

iphone 8 plus battery case3K/yr -25.5%5.5% conv.
iphone 8 plus charging case2K/yr -37.2%6.9% conv.
iphone 7 plus battery case2K/yr -44.0%8.1% conv.
iphone 7 plus charging case1K/yr +6.3%3.2% conv.
iphone 6s plus battery case942/yr -15.9%5.7% conv.
iphone 8 plus charger case951/yr -48.5%3.7% conv.

All search terms

Top iphone 8 plus battery case 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★)1 product missing review or click data not plotted

All 6 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Trswyop Battery Case for iPhone 6s Plus/6 Plus/7 Plus/8 Plus 8500mAh Portable Charging Case External Battery Pack for iPhone 6s Plus/6 Plus/7 Plus/8 Plus Rechargeable Charger Case (5.5 inch) Black

Trswyop$19.783.8★2,675 rev

Battery Case for iPhone 6 Plus/6s Plus/7 Plus/8 Plus 10000mAh Portable Battery Pack Rechargeable Smart Charger Case Compatible with iPhone 6 Plus/6s Plus/7 Plus/8 Plus (5.5 inch) Battery Case (Black)

YINGYKJ$27.463.9★103 rev

Battery Case for iPhone 8plus/7plus/6 Plus/6s Plus Upgraded [8500mAh] Protective Portable Charging Case Rechargeable Extended Battery Pack for Apple iPhone 8plus/7plus/6 Plus/6s Plus(5.5) - Black

QTshine$18.933.8★2,299 rev

Loytal Battery Case for iPhone 8 Plus / 7 Plus / 6S Plus / 6 Plus 6000mAh Rechargeable Extended Battery Charging/Charger Case Adds 1.5X Extra Juice Supports Wired Headphones

Loytal$21.854.0★50 rev

SlaBao Battery Case for iPhone 8 Plus/7 plus/6s Plus/6 Plus 5000mAh Charging Case with Kickstand Portable Extend Battery Charger Cover for 5.5 iPhone 8 Plus -Black

SlaBao$36.040.0★0 rev

Newest

by launch date

SlaBao Battery Case for iPhone 8 Plus/7 plus/6s Plus/6 Plus 5000mAh Charging Case with Kickstand Portable Extend Battery Charger Cover for 5.5 iPhone 8 Plus -Black

SlaBao$36.040 rev

12mo ago

DUEDUE for iPhone 8 Plus Case iPhone 7 Plus Case Magnetic[Compatible with Magsafe] Translucent Matte Back Protective Cover Anti-Scratch Shockproof Phone Case for iPhone 7 Plus/8 Plus Black

DUEDUE$10.00348 rev

2y ago

Battery Case for iPhone 6 Plus/6s Plus/7 Plus/8 Plus 10000mAh Portable Battery Pack Rechargeable Smart Charger Case Compatible with iPhone 6 Plus/6s Plus/7 Plus/8 Plus (5.5 inch) Battery Case (Black)

YINGYKJ$27.46103 rev

2y ago

Loytal Battery Case for iPhone 8 Plus / 7 Plus / 6S Plus / 6 Plus 6000mAh Rechargeable Extended Battery Charging/Charger Case Adds 1.5X Extra Juice Supports Wired Headphones

Loytal$21.8550 rev

6y ago

Trswyop Battery Case for iPhone 6s Plus/6 Plus/7 Plus/8 Plus 8500mAh Portable Charging Case External Battery Pack for iPhone 6s Plus/6 Plus/7 Plus/8 Plus Rechargeable Charger Case (5.5 inch) Black

Trswyop$19.782,675 rev

6y ago

What buyers say about iphone 8 plus battery case

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

What buyers love

Size-Overall70%

“Good fit”

Battery Life20%

“Long lasting battery”

Color10%

“Love the color”

What buyers complain about

Durability42%

“lasted 5 years before the connector to the iPhone broke”

Quality-Overall25%

“The quality seems not good”

Charging17%

“then simply stopped functioning at all - won't take a charge”

Battery Life17%

“doesn't function as a battery”

Top return reasons

Size-Overall29%

Charging28%

Compatibility-Overall15%

Magnetic Strength/Adsorption5%

Value For Money4%

Functionality-Overall3%

Advertised Vs Actual Product3%

Defective Material/Parts2%

Material Quality1%

Socket/Port/Plug1%

Common questions

Is iphone 8 plus battery case profitable to sell on Amazon United States?: The niche generates $26K/yr across 6 tracked products. 90-day search growth is -30.7%. Flapen's verdict: Skip it (38/100).
How competitive is the iphone 8 plus battery case niche?: 6 brands and 7 sellers compete. The top 5 products take 96% of clicks and top 5 brands hold 96% of demand.
What do buyers complain about in iphone 8 plus battery case?: Top complaints mined from reviews: Durability, Quality-Overall, Charging. The return rate is 4.1%.
When does demand for iphone 8 plus battery case peak?: Demand peaks in Jul–Aug–Dec; the busiest month runs 2.0× the quietest.
What does it cost to enter the iphone 8 plus battery case niche?: Listings span $10.00–$36.04; the average listing price is $22.34 (sweet spot $15–$100). The average incumbent carries 913 reviews — the moat a new listing must climb.