Best Smartphone Battery Cases for 2025

Top portable chargers offer a practical way to boost your smartphone or device battery life. However, many can be bulky. A battery case provides a streamlined alternative designed for your phone, eliminating the hassle of tangled cables common with standard power banks.

Quick Picks: Top Smartphone Battery Cases

Mophie Juice Pack Battery Case

0See it at Amazon

ZEROLEMON Battery Case

0See it at Amazon

Mophie Juice Pack Wireless

0See it at Amazon

NEWDERY Battery Case

0See it at Amazon

Mophie Juice Pack Connect

1See it at Amazon

Battery cases should extend your phone’s power while shielding it from damage. You’ll want one that doesn’t block features like NFC or ports and keeps bulk to a minimum. Support for wireless or fast charging adds convenience. Some cases, however, are overly heavy or fail to charge reliably. We’ve selected five top battery cases for leading smartphones to guide your choice.

Shopping for a new phone? Explore our top picks for the best smartphones available now, including highly rated Androids, iPhones, and gaming-focused devices.

Not sold on battery cases? Check our curated guides for other phone accessories, such as wireless chargers, portable power banks, and screen protectors to safeguard your iPhone 16 Pro from drops.

1. Mophie Juice Pack Battery Case

Top iPhone 16 Pro Battery Case

Mophie Juice Pack Battery Case

0Get robust protection, extra power, and a sleek design with this iPhone 16 Pro battery case. See it at Amazon

Product SpecificationsCapacity2,800 mAhSize6.5" x 2.9" x 0.71"Weight3.5 ounces

PROSSlim and lightweightIntegrated magnet for accessory compatibilityCONSSmaller battery capacity

The iPhone 16 Pro’s 3,582mAh battery handles moderate use well but drains faster during heavy tasks like photography, social media, or gaming. The Mophie Juice Pack Battery Case for iPhone 16 Pro extends usage with its 2,800mAh battery. It slides onto the phone, connecting via USB-C, and includes an indicator light to monitor battery levels. A standby mode prevents overcharging.

While it doesn’t offer the largest capacity, this case boosts the iPhone 16 Pro’s battery by about 50%, staying slim and lightweight at 3.5 ounces. It’s easy to handle and fits comfortably in a pocket or bag, making it one of the top iPhone accessories available.

This case also provides solid protection, rated for drops up to 6 feet, reducing worry over accidental slips. Raised edges guard the screen and camera against scratches and cracks. It includes a passive magnet for accessory attachment but lacks wireless charging support.

2. ZeroLemon Battery Case

Top iPhone 16 Pro Max Battery Case

ZEROLEMON Battery Case

0Protect and power your iPhone 16 Pro Max with this durable case, featuring dual 5,000 mAh batteries and military-grade defense. See it at Amazon

Product SpecificationsCapacity10,000 mAh (2 x 5,000 mAh)Size6.74" x 3.48" x 0.99"Weight8.5 ounces

PROSMilitary-grade durabilitySupports 18W fast chargingCONSNo data passthrough

The iPhone 16 Pro Max’s 4,685mAh battery is substantial, but heavy use like filming in Cinematic Mode or gaming on Apple Arcade can drain it fast. The ZeroLemon Battery Case offers dual 5,000mAh batteries, providing roughly 1.5 additional charges. LED indicators show charging status and battery levels.

Built for toughness, this case features military-grade protection and shockproofing to keep your phone safe. Its 10,000mAh capacity adds noticeable bulk, making it ideal for users with larger hands. With 18W fast charging via USB-C, it powers your phone from 0% to 100% in about two hours. However, it lacks support for data passthrough or wired headsets via USB-C when attached.

3. Mophie Juice Pack Wireless

Top iPhone SE Battery Case

Mophie Juice Pack Wireless

0Power up your iPhone SE with this slim, protective case featuring a 2,525mAh battery and Qi wireless charging. See it at Amazon

Product SpecificationsCapacity2,525mAhSize2.81" x 4.14" x 0.66"Weight3.51 ounces

PROSSleek and lightweightQi wireless charging supportCONSProvides only one full charge

The iPhone SE (2022) delivers impressive performance for a budget smartphone running the latest iOS, but its 2,018mAh battery may not last a full day under heavy use. The Mophie Juice Pack Wireless provides a full charge, keeping your phone powered longer.

This slim Mophie case protects your device without adding much bulk, enhancing its durability. It includes short-circuit, overcharge, and temperature protection for safety. Recharge the case and phone together on a wireless charger, and passthrough technology supports lightning cable or headphone use without removing the case.

4. Newdery Battery Case

Top Samsung Galaxy S25 Battery Case

NEWDERY Battery Case

0Featuring an 8,000 mAh battery, sleek design, and wireless charging, the NEWDERY Battery Case powers the Samsung Galaxy S25 effectively. See it at Amazon

Product SpecificationsCapacity8,000 mAhSizeNot listedWeight2.82 ounces

PROSDisplays charging percentageSupports wireless chargingCONSDifficult to remove

The Samsung Galaxy S25’s 4,000mAh battery is robust for a compact Android phone, but heavy use can drain it quickly. The Newdery Battery Case adds 8,000mAh, offering nearly two full charges to support demanding features like cameras or gaming, while keeping bulk low.

This case connects via USB-C, maintaining NFC and data transfer functionality. It supports wireless charging and fast charging via USB-C for quick power-ups. Made from TPU and PC materials, it provides strong protection against damage. It’s also available for Galaxy S25 Plus and Ultra models.

5. Mophie Juice Pack Connect

Top Universal Battery Case

Mophie Juice Pack Connect

1Attach this versatile battery to any phone for wireless charging and a convenient stand. See it at Amazon

Product SpecificationsCapacity5,000 mAhSize2.7" x 4.09" x 0.56"Weight4.4 ounces

PROSUniversal Qi wireless charging designIncludes a standCONSSlightly tricky adapter attachment

Standard battery cases become obsolete when you upgrade your phone, but the Mophie Juice Pack Connect adapts to most devices. Instead of a full case, it attaches a 5,000mAh battery via a small anchor point on your phone or case, delivering power through Qi wireless charging.

This battery pack supports various smartphones and recharges wirelessly. It includes a stand for viewing videos or documents hands-free. Its flexibility makes it a future-proof option for your current and next phone.

Choosing the Right Battery Case

Selecting a battery case isn’t just about picking the highest capacity. Oversized options may not fit in your pocket. The ideal case balances battery capacity, size, and cost for practical use.

If you only need a charger for occasional use, a portable power bank might be better than a case molded to your phone. A good battery case should fit comfortably in your pocket or bag, add protection, and avoid excessive weight. High-capacity cases often lack features like fast or Qi wireless charging, which are valuable for daily use and simultaneous phone and case charging.

Battery Case FAQs

Are battery cases safe for phones?

Yes, battery cases are safe when used correctly. They supply power directly to your phone, switching to the phone’s battery once drained. Smartphones include charging monitors to prevent overloading. Overheating is a potential concern if the case lacks proper ventilation.

Should you fully drain a battery case before recharging?

No, draining lithium-based battery cases isn’t necessary and may reduce capacity over time. Partial charging is safe and helps maintain battery health.