The Best Battery Cases for Smartphones in 2025

Extend your smartphone's battery life effortlessly with a high-quality portable charger. While traditional power banks can be bulky, a sleek battery case offers a seamless solution, eliminating cable clutter. These cases provide extra power and protection, all in one convenient package.

TL;DR – Top Smartphone Battery Cases:

Mophie Juice Pack Battery Case
See it at Amazon

ZEROLEMON Battery Case
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Mophie Juice Pack Wireless
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NEWDERY Battery Case
See it at Amazon

Mophie Juice Pack Connect
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The ideal battery case boosts your phone's power, safeguards it from damage, and doesn't hinder functionality like NFC or ports. Wireless and quick charging are added bonuses. However, some cases add excessive bulk or unreliable charging. We've curated five top-rated options for leading smartphones.

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

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

This compact iPhone 16 Pro case offers protection, extended battery life, and a surprisingly slim profile. See it at Amazon

Specifications:
Capacity: 2,800 mAh
Size: 6.5" x 2.9" x 0.71"
Weight: 3.5 ounces

Pros: Compact and lightweight, integrated magnet for accessories.
Cons: Limited battery size.

The iPhone 16 Pro's 3,582mAh battery might suffice for moderate use, but demanding tasks drain it quickly. The Mophie Juice Pack adds a significant boost, extending usage considerably. Its slim design and light weight (3.5oz) ensure easy handling and portability. It offers drop protection up to 6ft and raised edges protect the screen and camera. Note: It lacks wireless charging.

2. ZeroLemon Battery Case

Best iPhone 16 Pro Max Battery Case

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

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 challenged by intensive use. ZeroLemon's case provides approximately 1.5 extra charges. LED indicators display battery levels. While offering robust protection, its bulkier size is a consideration. It supports fast 18W charging but lacks data passthrough or wired headset support.

3. Mophie Juice Pack Wireless

Best iPhone SE Battery Case

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

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 (2022)'s battery may struggle with heavy use. Mophie's Juice Pack Wireless provides a full charge, extending usage significantly. Its slim design adds minimal bulk, and it offers short-circuit, overcharge, and temperature protection. Wireless charging is supported, and passthrough technology allows for cable and headphone use.

4. NEWDERY Battery Case

Best Samsung Galaxy S25 Case

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

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

Pros: Charging percentage display, supports wireless charging.
Cons: Difficult to remove phone from case.

Despite the Galaxy S25's respectable battery, demanding apps can drain it quickly. The Newdery case adds almost two full charges. It offers NFC and data transfer via USB-C, supports wireless charging, and fast charging via USB-C. The TPU and PC materials provide excellent protection.

5. Mophie Juice Pack Connect

Best Universal Battery Case

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

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 future-proof solution. A small anchor attaches to your phone, and the 5,000mAh battery pack easily connects. Qi wireless charging supports various smartphones, and the included stand provides convenient viewing.

Choosing the Right Battery Case

Selecting a battery case isn't just about capacity; consider the balance of capacity, size, and price. If you only need occasional extra power, a portable charger might suffice. Find a case that fits comfortably in your pocket or bag without adding excessive weight or bulk. High-capacity cases may lack features like quick or wireless charging.

Battery Case FAQ

Are battery cases safe? Yes, when used correctly. Your phone monitors charging, preventing overcharging. Proper ventilation prevents overheating.

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