---
product_id: 317948615
title: "Battery Case for iPhone 11 Pro Max, 8500mAh Slim Portable Rechargeable Battery Pack Charging Case Compatible with iPhone 11 Pro Max (6.5 inch) Extended Battery Charger Case (Black)…"
brand: "jerss"
price: "NT$2429"
currency: TWD
in_stock: true
reviews_count: 8
url: https://www.desertcart.tw/products/317948615-battery-case-for-iphone-11-pro-max-8500mah-slim-portable
store_origin: TW
region: Taiwan
---

# Fast Charging iPhone 11 Pro Max Only 8500mAh Power Battery Case for iPhone 11 Pro Max, 8500mAh Slim Portable Rechargeable Battery Pack Charging Case Compatible with iPhone 11 Pro Max (6.5 inch) Extended Battery Charger Case (Black)…

**Brand:** jerss
**Price:** NT$2429
**Availability:** ✅ In Stock

## Summary

> 🔋 Power Up Your Life—Never Miss a Moment!

## Quick Answers

- **What is this?** Battery Case for iPhone 11 Pro Max, 8500mAh Slim Portable Rechargeable Battery Pack Charging Case Compatible with iPhone 11 Pro Max (6.5 inch) Extended Battery Charger Case (Black)… by jerss
- **How much does it cost?** NT$2429 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/317948615-battery-case-for-iphone-11-pro-max-8500mah-slim-portable)

## Best For

- jerss enthusiasts

## Why This Product

- Trusted jerss brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Easy Installation:** Slide in and power up with a simple push!
- • **LED Power Indicator:** Check your battery status at a glance!
- • **Satisfaction Guaranteed:** 12-month money-back guarantee for peace of mind!
- • **Sync-Through Technology:** Sync without removing the case—effortless connectivity!
- • **Double Your Battery Life:** Never run out of juice with 8500mAh capacity!

## Overview

The Battery Case for iPhone 11 Pro Max is a sleek, 8500mAh rechargeable power pack designed exclusively for the iPhone 11 Pro Max. It features easy installation, LED power indicators, and advanced sync-through technology, ensuring you stay connected and powered up without compromising on style. With a satisfaction guarantee, this case is perfect for professionals on the go.

## Description

Battery Case for iPhone 11 Pro Max, 8500mAh Slim Portable Rechargeable Battery Pack Charging Case Compatible with iPhone 11 Pro Max (6.5 inch) Extended Battery Charger Case (Black)…

## Features

- 🌈 IMPORTANT NOTE: This battery case Only compatible with iPhone 11 Pro Max (6.5 inch), Not compatible with iPhone 11 Pro(5.8 inch) and iPhone 11 (6.1 inch), Support the headphones that came with your phone. [Not support Wireless charging.]
- 🌈 Double Your Battery Life: Never run out of juice with 8500mAh battery case, certificated by CE, FC and RoHs. Supply enough power to FULLY and SAFELY charge your iPhone XR. Enjoy more talk time, music, movies, and internet surfing. The best choice for travel and work.(compatible with wired headphone)
- 🌈 Easy Installation & LED Indicator Lights: Soft top part makes installation easier. Sliding your phone into the case-pushing phone to the bottom Tightly-long pressing back button for 3 seconds. Besides, you can click the back indicator lights for 3 second to check how much power left. (0%-25%-50%-75%-100%)
- 🌈 Advanced Sync-Through Technology : You can sync your iPhone 11 Pro Max to your Mac book, PC or laptop without removing the battery case. 100% compatible with all iOS versions, Apple Pay, and future iOS software updates (Apple CarPlay is not supported).
- 🌈 100% Satisfaction Guarantee: If there is any reason makes you unsatisfied, contacts us to get your 12 months money back guarantee and lifetime technical support. Start your Risk-free purchase by clicking Add to Cart button.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Pattern | Solid |
| Theme | No Theme |
| Form Factor | Bumper |
| Color | Black |
| Finish Type | Smooth |
| Material Type | Rubber, Polycarbonate |
| Additional Features | Shock-Absorbent |
| Embellishment Feature | No |
| Is Autographed | No |
| Screen Size | 6.5 Inches |
| Compatible Devices | iPhone 11 Pro Max, 6.5 inch |
| Compatible Phone Models | iPhone 11 Pro Max |

## Product Details

- **Brand:** JERSS
- **Compatible Phone Models:** iPhone 11 Pro Max
- **Color:** Black
- **Compatible Devices:** iPhone 11 Pro Max, 6.5 inch
- **Material:** Rubber, Polycarbonate

## Images

![Battery Case for iPhone 11 Pro Max, 8500mAh Slim Portable Rechargeable Battery Pack Charging Case Compatible with iPhone 11 Pro Max (6.5 inch) Extended Battery Charger Case (Black)… - Image 1](https://m.media-amazon.com/images/I/610rxi0slxL.jpg)
![Battery Case for iPhone 11 Pro Max, 8500mAh Slim Portable Rechargeable Battery Pack Charging Case Compatible with iPhone 11 Pro Max (6.5 inch) Extended Battery Charger Case (Black)… - Image 2](https://m.media-amazon.com/images/I/617r4MPNI2S.jpg)
![Battery Case for iPhone 11 Pro Max, 8500mAh Slim Portable Rechargeable Battery Pack Charging Case Compatible with iPhone 11 Pro Max (6.5 inch) Extended Battery Charger Case (Black)… - Image 3](https://m.media-amazon.com/images/I/71WIkfgf9PS.jpg)
![Battery Case for iPhone 11 Pro Max, 8500mAh Slim Portable Rechargeable Battery Pack Charging Case Compatible with iPhone 11 Pro Max (6.5 inch) Extended Battery Charger Case (Black)… - Image 4](https://m.media-amazon.com/images/I/61xIzEZIWjS.jpg)
![Battery Case for iPhone 11 Pro Max, 8500mAh Slim Portable Rechargeable Battery Pack Charging Case Compatible with iPhone 11 Pro Max (6.5 inch) Extended Battery Charger Case (Black)… - Image 5](https://m.media-amazon.com/images/I/6195rEtOL3S.jpg)

## Questions & Answers

**Q: Does the case prevent the phone from breaking when dropped?**
A: It is bound to help protect the phone

**Q: Can you charge the case and your phone at the same time ?**
A: Yes both are recharged

**Q: Can I charge the case without my Phone in it?**
A: yes, you can charge this battery case without your iPhone 11 pro max in it. also you can charge the case when your iPhone is in it . Thanks!

**Q: Does this fit an iPhone 11 pro?**
A: Hello, thanks for your question.
this battery case only work for iPhone 11 pro max (6.5 inch), not suit for iPhone 11 pro(5.8 inch), Thanks.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great value!
*by J***E on July 14, 2022*

I ordered this product and the first one that arrived had a defect in the rubber. I was going to keep it anyway since the battery charger works well, but I decided I didn’t like the look of the defect so I sent it back and they promptly sent me a new one without any issues. Been using the replacement for about three weeks and I’m loving it. It is so slim and sleek that you can barely tell it’s a charging case. Cleans easily end nice to hold. Seems to protect the phone well while giving you peace of mind with a full battery back up for those days when you can’t keep it on the charger. A quality product for the price!

### ⭐ I got a bogus case lol
*by A***M on May 25, 2024*

This is the first time I got a replacement for my case and never had issues before so….i gotta bogus damaged battery case…not sure what happened or why I got that bad one but it was in horrible condition. Didn’t even charge either. Was very dirty as well

### ⭐⭐⭐⭐⭐ Help you to finish your day with out carrying your car or home charger and protect your phone
*by L***S on August 26, 2022*

Love the way I finish my days with an extra battery

## Frequently Bought Together

- Battery Case for iPhone 11 Pro Max, 8500mAh Slim Portable Rechargeable Battery Pack Charging Case Compatible with iPhone 11 Pro Max (6.5 inch) Extended Battery Charger Case (Black)
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**Shop now:** [https://www.desertcart.tw/products/317948615-battery-case-for-iphone-11-pro-max-8500mah-slim-portable](https://www.desertcart.tw/products/317948615-battery-case-for-iphone-11-pro-max-8500mah-slim-portable)

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*Product available on Desertcart Taiwan*
*Store origin: TW*
*Last updated: 2026-11-12*