Best Small Power Bank: Top 2025 Picks

Let’s keep this quick: you need juice on the go, but lugging around a bulky brick? No thanks. That’s why finding the best small power bank matters—especially when travel and daily commutes rule your routine. We’ve hunted down the smallest, pocket-friendly options that pack a punch without weighing you down. These compact powerhouses are designed to be incredibly portable, slipping easily into any pocket or bag while still providing enough juice to keep your devices alive. Get ready to discover the tiny titans that are set to dominate the market in 2025, ensuring you're always powered up and ready to go.

3 Best Small Power Banks in 2025

Let’s dive into the small power bank market and see which models stand out in 2025. Each of these picks brings something unique to the table—be it wireless charging, built-in connectors, or extra capacity. Instead of just focusing on battery size, we’ll highlight what makes each power bank special, so you can find the perfect match for your needs.

1. Anker Nano Power Bank (5K, MagGo, Slim)

When size matters most, the Anker Nano Power Bank (5K, MagGo, Slim) is practically invisible. Measuring just 10.3 x 7.06 x 0.86 cm and weighing about the same as a set of keys, it slides into any pocket without adding bulk. It’s slimmer than most wallets but doesn’t compromise on performance.

This tiny power bank brings the power of MagSafe-like Qi2 15W wireless charging, a 20W wired option, and even a built-in foldable stand to prop up your phone. Add smart app control via the Anker app, and you get an ultra-portable power solution that feels far bigger than its size suggests. Perfect for anyone who wants a compact device packed with intelligent features.

Key Features

• Ultra-thin & lightweight design
• Qi2 15W wireless charging
• 20W wired fast charging
• Smart app for monitoring
• Foldable phone stand

2. Anker Nano Power Bank (22.5W, Built-In USB-C Connector)

If you’re tired of forgetting cables or untangling wires, this one’s for you. Weighing just 100 grams and roughly the size of a lighter, the Anker Nano Power Bank (22.5W, Built-In USB-C Connector) is all about grab-and-go convenience. Its integrated flip-out USB-C connector tucks neatly inside the body, ready whenever you are.

It delivers a powerful 22.5W fast charge, juicing up most phones in under an hour. Plus, it’s crafted using 75% recycled materials, making it as responsible as it is reliable. Ideal for Android users, iPad owners, and iPhone 15 users who want speed, sustainability, and simplicity—all in one pocket-sized device.

Key Features

• Built-in USB-C connector
• Compact, cable-free design
• Just 100g in weight
• Eco-friendly recycled materials

3. Anker MagGo Power Bank (10K, Slim)

Need extra power without carrying a brick? The Anker MagGo Power Bank (10K, Slim) hits the sweet spot. With dimensions of 1.47 x 7.06 x 10.4 cm, it's surprisingly slim for its large battery capacity. It’s built for those who need all-day power in a form that still fits in your jacket or bag pocket.

Its MagSafe-style wireless charging locks magnetically to your iPhone for seamless charging, and the dual-device support means you can juice up wirelessly and through USB-C at the same time. Whether you're travelling, commuting, or just glued to your phone, this slim beast delivers reliable power on demand.

Key Features

• Slim 10,000mAh capacity
• 15W magnetic wireless charging
• USB-C and wireless dual charging
• Travel-friendly compact design
• Magnetic alignment for secure charge

What to Look for in the Best Small Power Banks

When shopping for the small power bank that’s right for you, it’s not just about size. Here are some practical features and considerations to keep in mind.

• True portability: Look for models under 150 grams and compact enough to fit in your pocket or smallest bag. Dimensions under 11 cm in length are ideal for everyday carry.
• Charging speed: Fast charging is a must. USB-C Power Delivery (PD) or Quick Charge support (15W, 20W, or even 22.5W) ensures your devices get topped up quickly, whether you’re at a café or on the S-Bahn.
• Wireless vs. wired: Decide if you want the convenience of wireless charging (like MagSafe or Qi2) or prefer a built-in connector for direct plug-in. Wireless is great for iPhone users, while a built-in USB-C suits Android and new iPhone 15 owners.
• Battery capacity: 5,000mAh is perfect for emergencies or a single full charge. 10,000mAh is better for longer trips, sharing, or charging multiple devices.
• Built-in features: Extras like integrated cables, foldable stands, or LED battery indicators add real-world value.
• Durability & materials: Choose sturdy, high-quality materials (some models use recycled plastics) for daily use and travel. A solid build means your power bank will survive drops and bumps.
• Safety & compliance: Make sure your small power bank meets EU safety standards and includes protections against overheating, overcharging, and short circuits. This is especially important for flights—most airlines allow power banks under 100Wh (about 27,000mAh) in carry-on luggage.

Conclusion

In an increasingly mobile and interconnected world, the best small power bank has transformed from a mere accessory into an indispensable tool. As we've explored, the innovations in 2025 offer remarkable power in incredibly compact forms, ensuring your devices stay charged without weighing you down. No more scrambling for wall outlets or carrying bulky chargers—embrace the freedom and convenience that these mighty mini powerhouses bring to your digital life!

FAQs

What is the best small power bank?

The Anker Nano Power Bank (5000 mAh MagGo Slim) stands out as the top small power bank. At just 103 × 70.6 × 8.6 mm—credit-card thin—it delivers 15 W Qi2 wireless charging at true MagSafe speeds and 20 W USB-C input/output for fast cable recharges. You also get a handy fold-out stand and full IOT control via the Anker app, making it perfect for charging on the move.

What is the best cheap power bank?

The Anker Nano Power Bank (22.5W, Built-In USB-C Connector) is one of the best cheap power bank. Its fold-out USB-C plug means you ditch extra cables, and 22.5 W bidirectional charging juices up your phone in minutes. With a 5000 mAh capacity, CE certification, and ultra-compact design, it slips into any pocket. Priced under $30, it’s a true bargain.

What is the best power bank size?

The best power bank size depends on your needs, but for most people, 10,000mAh is a great balance of portability and power. It can typically charge a smartphone 1–2 times, making it ideal for daily use, commuting, or short trips. If you need to charge multiple devices or want more backup power, consider a 20,000mAh model—but for everyday use, 10,000mAh is usually enough.

How many watts should a good power bank have?

A good power bank should have 10W to 18W output for basic smartphone charging. If you’re charging tablets or larger phones, go for 18W to 30W. For laptops or power-hungry devices, choose a power bank with 30W to 100W or more. The right wattage depends on what you’re charging—higher output means faster, more efficient charging for bigger devices.