How to Choose the Right Power Bank: A Complete Buyer’s Guide

Who hasn't felt that pang of anxiety seeing the red battery icon flash on their smartphone?? Whether you're on the move, on a long train ride, or simply at the end of a busy day, a dead battery never comes at a good time. A power bank, also known as a portable charger, has become the essential accessory to ensure you never run out of juice again.

Faced with an overwhelming number of options, it can be difficult to find your way. This guide breaks down the essential criteria for you to choose the portable battery that perfectly suits your needs, without drowning you in technical jargon.

How to Choose Your Power Bank??

Before looking at specific models, it's crucial to understand the three features that make all the difference?: capacity, power, and connectivity.

Capacity (mAh)?: Endurance Above All

Expressed in milliampere-hours (mAh), capacity simply represents your battery's energy reserve. To put it simply?: the higher the mAh number, the more you can recharge your devices.

• 5,000 to 10,000?mAh Power Bank?: Compact and lightweight, these models are perfect for your daily carry. A capacity of 5,000?mAh can typically provide one full charge for a modern smartphone. It's ideal for avoiding a dead battery at the end of the day.
• 20,000?mAh Power Bank or more?: With such a reserve, you have enough to charge your smartphone several times, or power multiple devices simultaneously (phone, tablet, headphones). A 20,000?mAh power bank is the ideal travel companion for long trips, weekends, or family use.

Power and Charging Speed (W)

The output power, expressed in watts (W), determines how fast your device will charge. A standard battery provides about 5?W. To benefit from fast charging, look for models offering higher power (18?W, 22.5?W, 30?W, or more) that are compatible with protocols like Power Delivery (PD).

A USB-C power bank equipped with Power Delivery can charge a compatible smartphone from 0 to 50% in about thirty minutes. Remember to check if your smartphone battery is compatible with these technologies to take full advantage of them.

Connectivity and Features

Modern batteries go far beyond a simple USB-A port.

• USB-C Ports?: Now a must-have, they are used both to recharge the power bank itself and to power your devices, often with a higher charging speed.
• Integrated Cables?: Some models include a USB-C or Lightning cable directly attached. This is convenient for avoiding the hassle of an extra cable.
• Wireless Charging?: A MagSafe wireless charger or Qi-compatible one allows you to charge your phone simply by placing it on the battery, without any cables. A highly appreciated convenience for owners of compatible devices.

Our Power Bank Recommendations

Here is a selection of three models that meet different needs, from the urban commuter to the frequent traveller.

Anker 5000mAh Nano Power Bank Mini

Why it stands out?: Its key feature is its extreme compactness and its built-in, foldable USB-C connector. It plugs directly into your smartphone, eliminating the need for any cable.

Key features?:

• Capacity?: 5,000?mAh, enough to provide a full charge for most smartphones.
• Power?: Up to 22.5?W output for fast charging.
• Design?: Integrated foldable USB-C connector, no cable needed?!
• Portability?: A feather-light 100?g, it slips into any pocket.

Who is it for?? Ideal for the daily user looking for a discreet and ultra-portable backup solution to eliminate end-of-day battery anxiety. It's the perfect companion for outings where you want to travel light.

Belkin BOOST CHARGE Power Delivery Power Bank 20,000 mAh

Why it stands out?: This model combines a very high capacity with great versatility, allowing you to charge up to three devices at once, including some laptops.

Key features?:

• Capacity?: 20,000?mAh, enough to last several days away from an outlet.
• Power?: 30?W of shared output, Power Delivery compatible for quickly charging smartphones, tablets, and even a MacBook Air.
• Connectivity?: An integrated USB-C cable, a USB-C port, and a USB-A port for ultra-comprehensive connectivity.
• Functionality?: Pass-through technology that allows you to charge the battery and a connected device simultaneously.

Who is it for?? Aimed at travellers, mobile professionals, and anyone who needs a large energy reserve to power multiple devices. Its capacity and power make it a powerful ally for long journeys.

VARTA MAG PRO WIRELESS 5000

Why it stands out?: It offers the convenience of magnetic wireless charging, attaching securely to the back of compatible smartphones for effortless, cable-free charging.

Key features?:

• Capacity?: 5,000?mAh, a capacity well-suited for daily use.
• Technology?: MagSafe compatible (iPhone 12 and newer) and Qi standard with a magnetic accessory for other smartphones.
• Versatility?: Allows you to charge one device wirelessly and a second via the USB-C port simultaneously.
• Design?: Compact and designed to align perfectly with the phone for efficient charging.

Who is it for?? Perfect for owners of recent iPhones or compatible Android devices who prioritise simplicity and dislike cables. It provides simple and seamlessly integrated charging on the go.

Looking for other options??

Our selection targets specific use cases. If your needs are different or if you simply want to explore more models, feel free to browse our complete category of portable chargers. There you will find a wider variety of capacities, designs, and features.

Discover our full range of power banks

Frequently Asked Questions about Power Banks

What power bank capacity should I choose for a smartphone??

For daily use and to ensure at least one full charge, a capacity of 5,000 to 10,000?mAh is generally sufficient. If you use multiple devices or are travelling for several days without access to an outlet, a 20,000?mAh battery or larger will be necessary.

Can you take a power bank on a plane??

Yes, but only in your carry-on luggage. Lithium batteries are prohibited in checked baggage. Most airlines limit the total capacity to 100?Wh (watt-hours), which is equivalent to about 27,000?mAh. A word of advice?: always check your airline's policy before travelling.

What is fast charging on a portable charger??

Fast charging is a technology that delivers higher electrical power (measured in watts) to charge the battery of a compatible device much faster than a standard charger. For it to work, the power bank, the cable, and the device (smartphone, tablet, etc.) must all be compatible with the same fast-charging protocol, such as Power Delivery (PD) or Quick Charge (QC).

By the Joybuy Editorial Team