---
title: "Iphone 8 Plus Battery Case — $26K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/cell-phones-accessories/iphone-8-plus-battery-case"
last_updated: "2026-08-09T15:54:17.883Z"
locale: en
meta:
description: "Niche score 38/100 · $26K/yr market · 10K searches/yr · $22.34 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 38/100 · $26K/yr market · 10K searches/yr · $22.34 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Iphone 8 Plus Battery Case — $26K/yr Amazon US Niche (2026) - Flapen"
---
# **iphone 8 plus battery case**
**Skip it**
A concentrated shelf (top 5 take 96% of clicks) — this niche doesn't clear our bar today.
Market size 6Growth 10Conversion 95Competition 3Returns 37Price range 80Avg price 93Brand share 10Review moat 65Quality gap 94
**Conversion**
**Incredible****12.0%**
search→purchase rate — share of searches ending in a sale
**Quality gap**
**Great****4.0★**
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**
**Good****912.5**
avg incumbent reviews — the moat a new listing must climb
**Returns**
**Okay****4.1%**
return rate — above 5% kills the launch gate
**Growth**
**Bad****-30.7%**
90-day search growth — must beat 0% to launch
**Brand share**
**Bad****96%**
top-5 brand share — brand-locked demand
**Market size**
**Bad****$26K**
$26K/yr · 10K searches
**Competition**
**Bad****96%**
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 ~~](https://flapen.com/research/methodology)
## **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**
**7**
**Top-5 brand share**
**96%**
Top 20: 100%
**Top-5 click share**
**96%**
Top 20: 100%
**Open market**
**0%**
- 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.
500300Spike '24Holiday '24Spike '25Prime Day '25Holiday '25 seasonDecMarJunAugNovMarMay
Peak months: Jul, Aug, Dec · busiest ÷ quietest = 2.0×
[**Open Trend **](https://flapen.com/research/us/cell-phones-accessories/iphone-8-plus-battery-case/trend)
## **Top iphone 8 plus battery case search terms**
- **iphone 8 plus battery case**3K/yr-25.5%5.5% conv. - **iphone 8 plus charging case**2K/yr-37.2%6.9% conv. - **iphone 7 plus battery case**2K/yr-44.0%8.1% conv. - **iphone 7 plus charging case**1K/yr+6.3%3.2% conv. - **iphone 6s plus battery case**942/yr-15.9%5.7% conv. - **iphone 8 plus charger case**951/yr-48.5%3.7% conv. [**All search terms **](https://flapen.com/research/us/cell-phones-accessories/iphone-8-plus-battery-case/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.
0%10%$3K20%$5K30%$8K40%$10K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
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
[1**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**$19.78**3.8★2,675 rev](https://www.amazon.com/dp/B07X9Q88Q8) [2**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**$27.46**3.9★103 rev](https://www.amazon.com/dp/B0CCRQH59Z) [3![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](https://m.media-amazon.com/images/I/41MN5NSLT9L.jpg)**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**$18.93**3.8★2,299 rev](https://www.amazon.com/dp/B07N1G4XCY) [4**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**$21.85**4.0★50 rev](https://www.amazon.com/dp/B089FP8GGV) [5**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**$36.04**0.0★0 rev](https://www.amazon.com/dp/B0FH1MH1JR)
**~~View all top sellers →~~**
### **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**$36.04**0 rev12mo ago](https://www.amazon.com/dp/B0FH1MH1JR) [![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](https://m.media-amazon.com/images/I/31H+rAkB6lL.jpg)**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**$10.00**348 rev2y ago](https://www.amazon.com/dp/B0CRHMTS7N) [**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**$27.46**103 rev2y ago](https://www.amazon.com/dp/B0CCRQH59Z) [**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**$21.85**50 rev6y ago](https://www.amazon.com/dp/B089FP8GGV) [**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**$19.78**2,675 rev6y ago](https://www.amazon.com/dp/B07X9Q88Q8)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**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**$21.85**4.0★**▲ 121%**](https://www.amazon.com/dp/B089FP8GGV) [**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**$36.04**0.0★**▲ 24%**](https://www.amazon.com/dp/B0FH1MH1JR) [![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](https://m.media-amazon.com/images/I/31H+rAkB6lL.jpg)**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**$10.00**4.6★**▲ 17%**](https://www.amazon.com/dp/B0CRHMTS7N) [![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](https://m.media-amazon.com/images/I/41MN5NSLT9L.jpg)**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**$18.93**3.8★**— 2%**](https://www.amazon.com/dp/B07N1G4XCY) [**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**$27.46**3.9★**— 2%**](https://www.amazon.com/dp/B0CCRQH59Z)
**~~View all trending →~~**
## **What buyers say about iphone 8 plus battery case**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**70%
*“Good fit”*
**Battery Life**20%
*“Long lasting battery”*
**Color**10%
*“Love the color”*
### **What buyers complain about **
**Durability**42%
*“lasted 5 years before the connector to the iPhone broke”*
**Quality-Overall**25%
*“The quality seems not good”*
**Charging**17%
*“then simply stopped functioning at all - won't take a charge”*
**Battery Life**17%
*“doesn't function as a battery”*
### **Top return reasons **
**Size-Overall**29%
**Charging**28%
**Compatibility-Overall**15%
**Magnetic Strength/Adsorption**5%
**Value For Money**4%
**Functionality-Overall**3%
**Advertised Vs Actual Product**3%
**Defective Material/Parts**2%
**Material Quality**1%
**Socket/Port/Plug**1%
## **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.
## **Related niches in Cell Phones & Accessories**
- 65 [**retractable iphone charger cord**](https://flapen.com/research/us/cell-phones-accessories/retractable-iphone-charger-cord)$1.8M/yr-28.0%**Worth a look**- 65 [**bluetooth headset**](https://flapen.com/research/us/cell-phones-accessories/bluetooth-headset)$2.7M/yr-2.2%**Worth a look**- 65 [**iphone 14 pro max screen replacement**](https://flapen.com/research/us/cell-phones-accessories/iphone-14-pro-max-screen-replacement)$1.1M/yr+5.7%**Launch it**- 65 [**iphone 15 pro max privacy screen protector**](https://flapen.com/research/us/cell-phones-accessories/iphone-15-pro-max-privacy-screen-protector)$3.0M/yr-5.1%**Worth a look**- 66 [**samsung charger**](https://flapen.com/research/us/cell-phones-accessories/samsung-charger)$2.4M/yr-4.5%**Worth a look**- 66 [**portable apple watch charger**](https://flapen.com/research/us/cell-phones-accessories/portable-apple-watch-charger)$869K/yr+15.4%**Launch it**[**All Cell Phones & Accessories niches **](https://flapen.com/research/us/cell-phones-accessories)