The Best Battery Cases for Smartphones in 2025

Extend your smartphone's battery life effectively with a high-quality portable charger. While many portable chargers can be bulky, a battery case offers a sleek, integrated solution, eliminating the need for extra cables. A good battery case seamlessly integrates with your phone, providing extra power and often additional protection.

TL;DR – The Best Smartphone Battery Cases:

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Mophie Juice Pack Battery Case
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ZEROLEMON Battery Case
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Mophie Juice Pack Wireless
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NEWDERY Battery Case
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Mophie Juice Pack Connect
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The ideal battery case boosts your phone's battery life, protects it from damage, and doesn't interfere with essential features like NFC or ports. Wireless and quick charging capabilities are significant pluses. However, some cases add excessive bulk or offer unreliable charging. We've curated five top-rated battery cases for popular smartphones.

Looking for a new phone? Check out our recommendations for the best phones, including top Androids, iPhones, and gaming phones.

Battery cases not for you? Explore our guides on wireless chargers, portable chargers, and screen protectors.

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1. Mophie Juice Pack Battery Case

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Best iPhone 16 Pro Battery Case

Mophie Juice Pack Battery Case
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Product Specifications
Capacity: 2,800 mAh
Size: 6.5" x 2.9" x 0.71"
Weight: 3.5 ounces

PROS: Compact and lightweight; Integrated passive magnet for accessories.
CONS: Limited battery size.

The iPhone 16 Pro's battery may struggle with heavy use. The Mophie Juice Pack provides a significant boost (approximately 50%), extending battery life while remaining surprisingly compact and lightweight. It offers drop protection up to 6 feet and includes a magnet for accessories. However, it doesn't support wireless charging.

2. ZeroLemon Battery Case

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Best iPhone 16 Pro Max Battery Case

ZEROLEMON Battery Case
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Product Specifications
Capacity: 10,000 mAh (2 x 5,000 mAh)
Size: 6.74" x 3.48" x 0.99"
Weight: 8.5 ounces

PROS: Military-grade protection; Supports 18W fast charging.
CONS: No data passthrough.

Even the iPhone 16 Pro Max's large battery can benefit from extra power, especially during intensive tasks. ZeroLemon's case offers a substantial boost with its dual 5,000mAh batteries, providing approximately 1.5 extra charges. It's built for durability with military-grade protection, but its larger size and weight should be considered. Fast charging is supported, but data passthrough and wired headset use are not.

3. Mophie Juice Pack Wireless

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Best iPhone SE Battery Case

Mophie Juice Pack Wireless
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Product Specifications
Capacity: 2,525 mAh
Size: 2.81" x 4.14 x 0.66"
Weight: 3.51 ounces

PROS: Slim, lightweight design; Supports Qi wireless charging.
CONS: Provides approximately one full phone charge.

The iPhone SE's battery might struggle with all-day use. The Mophie Juice Pack Wireless provides a full charge, extending usage. It's slim and protective, featuring wireless charging and passthrough technology for wired connections.

4. NEWDERY Battery Case

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Best Samsung Galaxy S25 Case

NEWDERY Battery Case
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Product Specifications
Capacity: 8,000 mAh
Size: Not listed
Weight: 2.82 ounces

PROS: Displays charging percentages; Supports wireless charging.
CONS: Difficult to remove phone from case.

The Samsung Galaxy S25's battery can benefit from extra power, especially with intensive use. The Newdery Battery Case provides almost two full charges, extending usage without adding excessive bulk. It supports wireless and fast charging, and maintains NFC and data transfer capabilities. Also available for Galaxy S25 Plus and Ultra models.

5. Mophie Juice Pack Connect

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Best Battery Case for Any Phone

Mophie Juice Pack Connect
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Product Specifications
Capacity: 5,000 mAh
Size: 2.7" x 4.09" x 0.56"
Weight: 4.4 ounces

PROS: Universal design; Uses Qi wireless charging; Includes a stand.
CONS: Slightly confusing adapter attachment.

The Mophie Juice Pack Connect offers a versatile solution compatible with various phones. It uses a modular design, attaching to your phone via an anchor point and providing a 5,000mAh battery with Qi wireless charging and a built-in stand.

How to Choose the Best Battery Case

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Choosing a battery case involves balancing capacity, size, and price. Consider your needs: a case for everyday use requires a different approach than one used occasionally. High-capacity cases often sacrifice features like quick charging or wireless charging. Prioritize a case that fits comfortably in your pocket or bag and provides adequate protection.

Battery Case FAQ

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Are battery cases safe for your phone? Yes, when used correctly. Smartphones monitor charging, preventing overcharging. Ensure the case provides proper ventilation to prevent overheating.

Should you drain your battery case before charging? No, fully draining lithium-ion batteries can damage them. Charge your battery case whenever needed.