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Extended Battery Cases

If your smartphone's battery life is a concern, you have a few options. You can choose a phone with a bigger battery, or you can buy a portable charger that gives you a few extra hours of power. But if you're looking for the best of both worlds, consider an extended battery case—a case that provides the protection of a traditional case and the extra power of a portable charger. Browse the top-ranked list of extended battery cases below along with associated reviews and opinions. 

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  1. mophie - Juice Pack for iPhone 16 Pro Max - Black

    SKU: J39T3V3Z2V

    Product Description

    A slim black case with built-in battery, offering extra power and 6-foot drop protection for iPhone.
    See all Cell Phone Cases
    Your price for this item is $99.99

  2. mophie - Juice Pack iPhone 15 Pro Max - Black

    SKU: J39T3VX4JJ

    Mophie iPhone 15 Pro Max charging case...This is by far the best iPhone case I have ever purchased!! It also extends the life of your battery, great product!!...Mophie always has remarkable products,...

    Product Description

    A black protective case with a built-in 3,000 mAh battery and up to 6-foot drop protection.
    See all iPhone Cases
    Your price for this item is $99.99

  3. mophie - Juice Pack for iPhone 16 Pro - Black

    SKU: J39T3V3Z2G

    Product Description

    A slim black case offering up to 50% extra battery life and 6-foot drop protection for iPhone 16 Pro.
    See all Cell Phone Cases
    Your price for this item is $59.99
    Save $40
    The previous price was $99.99

  4. mophie - Juice Pack Apple iPhone 17 Pro Max - Black

    SKU: J39T3VLPH3

    Product Description

    A slim black charging case offering up to 50% extra battery life and protection for your device.
    See all Cell Phone Cases
    Your price for this item is $99.99

  5. mophie - Juice Pack Apple iPhone 17 Pro - Black

    SKU: J39T3VLPQF

    Product Description

    A slim black charging case offering up to 50% extra battery life and protection for your iPhone.
    See all Cell Phone Cases
    Your price for this item is $99.99
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In-store pricing may vary. Prices and offers are subject to change. © 2026 Best Buy. All rights reserved. BEST BUY, the BEST BUY logo, the tag design, and MY BEST BUY are trademarks of Best Buy and its affiliated companies.