The Best Battery Cases for Smartphones in 2025

Extend your smartphone's battery life effortlessly with a top-rated portable charger—but many are bulky. A sleek battery case offers a superior solution, eliminating cable clutter. They seamlessly integrate with your phone, providing extra power without the bulk of traditional power banks.

TL;DR – Top Smartphone Battery Cases:

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 power, provides impact protection, and doesn't hinder features like NFC or ports. Wireless and fast charging are significant pluses. However, some cases add excessive bulk or offer unreliable charging. We've curated five excellent battery cases for popular smartphones.

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

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

1. Mophie Juice Pack Battery Case

Best iPhone 16 Pro Battery Case

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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 might struggle with heavy use. The Mophie Juice Pack extends its life significantly with its 2,800mAh battery. It's surprisingly compact, adding minimal bulk, and offers drop protection up to 6 feet. It includes a magnet for accessories but lacks wireless charging.

2. ZeroLemon Battery Case

Best iPhone 16 Pro Max Battery Case

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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 be taxed. ZeroLemon's case provides ample power with its 10,000mAh capacity (two 5,000mAh batteries), offering approximately 1.5 extra charges. Its rugged design offers military-grade protection, but its bulkier size is a trade-off for the extended battery life and fast charging capabilities.

3. Mophie Juice Pack Wireless

Best iPhone SE Battery Case

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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 one full phone charge.

The iPhone SE's battery can be a limiting factor. Mophie's Juice Pack Wireless provides a full charge and adds a slim protective layer. It supports Qi wireless charging and offers passthrough technology for wired accessories.

4. NEWDERY Battery Case

Best Samsung Galaxy S25 Case

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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.

Extend the Galaxy S25's battery life substantially with the NEWDERY 8,000mAh case, offering nearly two full charges. It supports wireless charging, maintains NFC and data transfer via USB-C, and provides good protection.

5. Mophie Juice Pack Connect

Best Universal Battery Case

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

Pros: Universal design; Qi wireless charging; Includes a stand.

Cons: Slightly confusing adapter attachment.

The Mophie Juice Pack Connect offers a universal solution, working with various phones via Qi wireless charging. Its 5,000mAh battery provides a significant boost, and it includes a convenient stand.

Choosing the Right Battery Case

Selecting a battery case involves balancing capacity, size, and features. Consider your needs: a large capacity case might be too bulky for daily use; prioritize a case that fits comfortably in your pocket or bag while offering adequate protection. Also, consider features like fast charging and Qi wireless charging for optimal convenience.

Battery Case FAQ

Are battery cases safe? Yes, when used correctly. Modern smartphones monitor charging to prevent overcharging. Proper ventilation is crucial to prevent overheating.

Should you fully drain battery cases? No, fully draining lithium-ion batteries can damage them, reducing their lifespan.