The Best Battery Cases for Smartphones in 2025

Extend your smartphone's battery life effortlessly with a top-rated portable charger. While many portable chargers can be bulky, a battery case offers a sleek, integrated solution, eliminating cable clutter. They provide extra power while adding a layer of protection to your device.

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 against damage, and doesn't interfere with features like NFC or ports. Wireless and quick charging are significant pluses. However, some cases add excessive bulk or offer unreliable charging. We've curated five excellent battery cases for popular phones.

Considering a new phone? Explore our recommendations for the best phones, including top Androids, iPhones, and gaming phones.

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

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1. Mophie Juice Pack Battery Case

Best iPhone 16 Pro Battery Case

Mophie Juice Pack Battery Case

Enjoy robust protection, extended battery life, and a compact design with this iPhone 16 Pro battery case. See it at Amazon

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 3,582mAh battery typically lasts a day with moderate use. However, demanding tasks like photography or gaming drain it faster. The Mophie Juice Pack adds a significant boost (2,800mAh), extending battery life considerably. It's surprisingly compact and lightweight, easily fitting in pockets. It also offers drop protection (up to 6ft) and raised edges to protect the screen and camera. It includes a passive magnet for accessories but lacks wireless charging.

2. ZeroLemon Battery Case

Best iPhone 16 Pro Max Battery Case

ZEROLEMON Battery Case

Safeguard and power your iPhone 16 Pro Max with this rugged case featuring two 5,000 mAh batteries and military-grade protection. See it at Amazon

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 and shockproofing; Supports 18W fast charging.
Cons: No data passthrough.

Even the iPhone 16 Pro Max's large 4,685mAh battery can be taxed by intensive use. ZeroLemon's case provides an enormous 10,000mAh capacity (two 5,000mAh batteries), offering approximately 1.5 extra charges. LED indicators display charging status. Its rugged design provides excellent protection, but its larger size and weight are considerations.

3. Mophie Juice Pack Wireless

Best iPhone SE Battery Case

Mophie Juice Pack Wireless

Power up your iPhone SE with this slim, lightweight protective case featuring a 2,525mAh battery and Qi wireless charging. See it at Amazon

Product Specifications

Capacity: 2,525mAh
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 (2022) boasts impressive performance but a smaller battery. The Mophie Juice Pack Wireless provides a full charge, extending usage significantly. Its slim profile adds minimal bulk, and it includes Qi wireless charging and passthrough technology for wired connections.

4. Newdery Battery Case

Best Samsung Galaxy S25 Case

NEWDERY Battery Case

Boasting an 8,000 mAh battery, compact design, and wireless charging, the NEWDERY Battery Case for the Samsung Galaxy S25 offers exceptional value. See it at Amazon

Product Specifications

Capacity: 8,000 mAh
Size: Not listed
Weight: 2.82 ounces

Pros: Display shows charging percentages; Supports wireless charging.
Cons: Difficult to remove phone from case.

The Samsung Galaxy S25's 4,000mAh battery can be quickly depleted by demanding apps. The Newdery Battery Case provides nearly two full charges (8,000mAh), extending usage considerably. It offers wireless charging and maintains access to the USB-C port for data transfer and NFC. It also provides protection against damage.

5. Mophie Juice Pack Connect

Best Battery Case for Any Phone

Mophie Juice Pack Connect

This universal battery attaches to your phone, offers wireless charging, and includes a convenient stand. See it at Amazon

Product Specifications

Capacity: 5,000 mAh
Size: 2.7" x 4.09" x 0.56"
Weight: 4.4 ounces

Pros: Universal design using Qi wireless charging; Includes a stand.
Cons: Slightly confusing adapter attachment.

The Mophie Juice Pack Connect is a versatile solution, compatible with various phones. It uses a small anchor point and attaches a 5,000mAh battery pack via Qi wireless charging. It also includes a built-in stand.

How to Choose the Best Battery Case

Selecting a battery case involves balancing capacity, size, and price. A large capacity isn't always best if it's too bulky. Consider whether you need a case for daily use or just occasional use; a portable charger might suffice for the latter. Prioritize cases that fit comfortably in your pocket or bag while offering adequate protection. Also, consider features like quick charging and Qi wireless charging.

Battery Case FAQ

Are battery cases safe for your phone?

Yes, when used correctly. The phone draws power from the battery case; once depleted, it switches to the phone's battery. Smartphones monitor charging to prevent overloading. However, poor ventilation can lead to overheating.

Should you drain your battery case before charging?

No. Draining lithium-ion batteries completely can damage them, reducing their capacity over time.