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YINGYKJ

Battery Case for iPhone 11 Pro Max, 10000mAh Ultra Thin Portable Protective Smart Charging Case Compatible with iPhone 11 Pro Max (6.5 inch) Rechargeable Extended Battery Charger (Black)

  • Based on 188 reviews
Condition: New
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$29.78 Why this price?

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As low as $7 / mo
  • – 4-month term
  • – No impact on credit to apply
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To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

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Availability: In Stock.
Fulfilled by Amazon
Arrives Saturday, Oct 3
Order within 9 hours and 10 minutes
Available payment plans shown during checkout
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Size: iPhone 11 Pro Max


Features

  • Advanced Sync-through TECHNOLOGY: Amazing sync-through technology that you can charge your battery case and iPhone 11 Pro Max simultaneously with your existing iPhone charging cable,conveniently sync your iPhone 11 Pro Max to your MacBook, PC or laptop without having to take the battery case off.
  • IMPORTANT NOTE: Only compatible with iPhone 11 Pro Max (6.5inch),Not compatible with iPhone 11 and iPhone 11 Pro, Support the headphones that came with your phone. [Not support Wireless charging.]
  • MAX PROTECTION: The battery case is not only a portable charger, but also a protector for your iphone.Raised sides and hard-shell design maximizes protection to your iPhone 11 Pro Max, durable high- class material to protect your iPhone from scratches, drops, impacts and other daily wear and tear.
  • LONG BATTERY LIFE: 10000mAh capacity rechargeable built-in lithium polymer battery case provides extra 180%+ power which is equivalent to an additional 8+ hours talk time or 12+ hours web-browsing time. 4 LED lights indicate how much power you have (25%--50%--75%--100%). Power switch allows you to switch on/off the battery case.
  • 100% SATISFACTION GUARANTEEDThank you for choosing [YINGYKJ]! We are committed to providing you with the highest quality products and an exceptional shopping experience. Your satisfaction is our top priority, which is why we offer comprehensive after-sales support to ensure you are completely happy with your purchase.

Description

【100% SATISFACTION GUARANTEED】Thank you for choosing [YINGYKJ]! We are committed to providing you with the highest quality products and an exceptional shopping experience. Your satisfaction is our top priority, which is why we offer comprehensive after-sales support to ensure you are completely happy with your purchase.

Brand: YINGYKJ


Compatible Phone Models: iPhone 11 Pro Max


Color: Black


Compatible Devices: ['iPhone 11 Pro Max']


Material: Polycarbonate, Rubber


Compatible Phone Models: iPhone 11 Pro Max


Compatible Devices: ['iPhone 11 Pro Max']


Water Resistance Level: Not Water Resistant


Embellishment Feature: No embellishment


Additional Features: Universal


Screen Size: 6.5 Inches


Is Autographed: No


Compatible Cellular Phone Models: Apple iPhone 11 Pro Max


Color: Black


Pattern: Solid


Theme: Number


Form Factor: Basic Case


Model Number: FYT-D10S


Brand: YINGYKJ


Customer Package Type: FFP


Unit Count: 1.0 Count


Manufacturer: Shenzhen FengYunTong Technology Co., Ltd.


Age Range Description: Adult


Mfr Part Number: 01


Warranty Description: 1


Enclosure Material: Polycarbonate, Rubber


Finish: Smooth


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Oct 3

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Awesome!
Size: iPhone 11 Pro Max
I get these for my mom and she loves them! It saves her batter port from wearing out, they last for about a year, and they still protect the phone!
Reviewed in the United States on May 22, 2026 by Heather
    • Important life
Size: iPhone 11 Pro Max
I will always buy this as long as it’s available.
Reviewed in the United States on July 13, 2026 by Tamura
    • Quality not required for this company…it’s profit only at the consumers expense (time & dollars).
Size: iPhone XS Max
Review Image by Disappointed
After 6 attempts to charge, this product has proven to be a waste of my resources! The battery case would not hold the charge.. do not purchase this product. The batteries are useless and it’s a rip off and to find out if it works they need to give you more than 30 days for a return so I have to eat this product because it’s been 31 days. ... show more
Reviewed in the United States on June 11, 2024 by Disappointed
    • No company or product logos on it!
Size: iPhone 11 Pro Max
It’s 2026. Works very well and looks very sleek. It extends the battery life of my now very old iPhone 11Pro Max. Make sure you only have apps running in the background that need to be running in the background to further extend battery life.
Reviewed in the United States on April 18, 2026 by Salomon Eli Farin
    • Power on the go
Size: iPhone 11 Pro Max
Useful but slow to charge. One complete recharge to phone and some residual for last minute needs.
Reviewed in the United States on July 27, 2025 by Amazon Customer
    • Love it
Size: iPhone 11 Pro
Really saves so much time. If you’re working this is a big life saver. Just be careful putting the case on because the port in the case I kept bending it and it snapped in half but I believe it was me putting it in all rough 😂😂😂 10/10 recommend
Reviewed in the United States on March 24, 2024 by Dark
    • Value matches price
Size: iPhone 11 Pro Max
It’s alright. It basically is good for one charge it seems so far. I’ve had it for a few days. Comes in handy at work and is good for the price I guess. You get what you pay for right?
Reviewed in the United States on December 20, 2025 by Blake
    • Excellent battery case for legacy phones like the iPhone 11 Pro
Size: iPhone 11 Pro
Nothing will be as well-designed as the original Apple-made battery cases, but they're not made anymore, and this case is a pretty good second-best option. Much, much better than the other battery cases I've tried, other than the original Apple-made one. The ear pods work fine with them and the battery case enables me to get through a long day without having to recharge. ... show more
Reviewed in the United States on February 14, 2025 by East Side Rob in New York

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