Power Banks UK

Shop power banks and portable chargers in the UK for keeping smartphones, tablets, earbuds and other compatible devices powered when you are away from a wall socket.

The Zextons range includes compact 5,000mAh power banks, popular 10,000mAh models, higher-capacity 20,000mAh options and selected larger portable battery packs. You can also find USB-C fast-charging power banks, wireless models, products with built-in charging cables, multiple outputs, LED battery displays and integrated stands.

The best power bank depends on how much stored capacity you need, which devices you want to charge and whether portability, fast charging or multiple connections matter most.

For more mobile accessories, explore our full range ofPhone Accessories UK.

Shop Power Banks by Capacity

Power bank capacity is usually shown in mAh, or milliamp-hours.

A higher mAh figure generally means more stored battery capacity, but it can also mean a larger or heavier power bank. Choosing the highest number is therefore not always the best option for every user.

5,000mAh Power Banks

A 5,000mAh power bank is a compact option for users who prioritise portability.

Smaller power banks can be useful for:

• everyday emergency top-ups

• commuting

• short trips

• carrying in a small bag

• keeping a phone powered between charging opportunities

They are usually easier to carry than larger-capacity models.

The exact amount of usable charging depends on the phone battery, conversion losses and how the device is used while charging.

10,000mAh Power Banks

A 10,000mAh power bank offers a useful balance between stored capacity and portability for many smartphone users.

This is one of the most versatile capacity ranges because it can suit everyday use without becoming as bulky as some higher-capacity battery packs.

Zextons offers 10,000mAh models with different features, which may include:

• USB-C charging

• wired fast charging

• wireless charging

• built-in cables

• multiple outputs

• LED battery displays

• integrated stands

Check the individual product listing because features and charging capabilities vary between models.

20,000mAh Power Banks

A 20,000mAh power bank provides more stored capacity for users who spend longer periods away from a mains charger or regularly charge several compatible devices.

It can be useful for:

• longer journeys

• multiple phone charges

• charging more than one device

• tablets and other compatible USB devices

• users who do not want to recharge the power bank as frequently

Higher capacity usually comes with additional size and weight, so consider portability as well as battery capacity.

High-Capacity Power Banks

Selected Zextons products offer capacities above 20,000mAh.

These larger power banks can suit users who prioritise stored energy over compact size.

However, higher-capacity products deserve extra compatibility and travel checks.

If you intend to take a large power bank on a flight, do not assume that capacity alone determines whether it can travel. Check the product's stated watt-hour rating and your airline's current battery rules before flying.

Shop Power Banks by Charging Type

Capacity tells you how much energy a power bank stores. The charging connections and supported power determine how that energy can be delivered to compatible devices.

Fast-Charging USB-C Power Banks

A fast-charging power bank can provide higher charging power when the power bank, connected device and cable support compatible charging technology.

USB-C is common across modern smartphones, tablets, power banks and many other portable devices.

When comparing fast-charging models, check:

• USB-C input and output

• stated wattage

• supported charging standard

• cable compatibility

• device requirements

A power bank being advertised with a particular maximum wattage does not mean every connected phone will charge at that full rate.

The final charging speed depends on the entire setup.

If you need a replacement cable, browse ourUSB-C & Charging Cables.

Wireless Power Banks

A wireless power bank combines portable battery storage with wireless charging for compatible devices.

Instead of connecting a charging cable directly to the phone, you can place a supported phone against the wireless charging area.

Some models may also provide wired charging at the same time.

Wireless charging requires compatible hardware, so check:

• whether your phone supports wireless charging

• the product's stated wireless standard

• supported charging power

• phone-case compatibility

• positioning requirements

Do not assume every wireless power bank works identically with every smartphone.

Power Banks with Built-In Cables

A power bank with built-in cables can reduce the number of separate charging accessories you need to carry.

Depending on the model, built-in connections may include:

• USB-C

• Lightning-style connections

• Micro-USB

• multiple connector combinations

This can be especially useful for travel, commuting or users who regularly charge more than one type of device.

Check the individual listing to confirm which built-in connectors are included.

Multi-Port Power Banks

A multi-port power bank provides more than one charging output.

Some models combine:

• USB-A

• USB-C

• built-in cables

• wireless charging

This can make it possible to charge several compatible devices from one portable battery.

However, total available charging power may be divided differently when multiple outputs are used at the same time.

If charging speed matters, check the individual product's total output and per-port specifications.

Power Banks with LED Displays & Stands

Some portable chargers include additional convenience features such as:

• digital battery displays

• LED percentage indicators

• integrated phone stands

• wireless charging surfaces

• built-in cables

An LED display can make it easier to see how much stored battery remains compared with a simple indicator-light system.

A built-in stand can also be useful when charging a compatible phone on a desk or table.

These features do not replace the need to check capacity and charging compatibility, but they can make everyday use more convenient.

What Power Bank Capacity Do You Need?

The right capacity depends on how you plan to use the power bank.

For occasional emergency charging, a smaller 5,000mAh option may be enough.

For everyday smartphone use, 10,000mAh can provide a practical balance between portability and stored capacity.

For longer journeys, multiple devices or less frequent access to mains charging, a 20,000mAh or higher-capacity model may be more suitable.

Think about:

• your phone's battery size

• how often you travel

• how many devices you carry

• how often you can recharge the power bank

• whether size and weight matter

• whether you need wireless charging

• whether you need multiple outputs

There is no single capacity that is automatically best for everyone.

Power Bank Capacity vs Charging Speed

Capacity and charging speed are two different things.

Understanding the difference can make comparing portable chargers much easier.

What Does mAh Mean?

mAh means milliamp-hours and is commonly used to describe battery capacity.

For power banks, it helps indicate how much electrical charge the internal battery can store.

A larger mAh figure generally means more stored capacity.

It does not automatically mean faster charging.

What Does Wattage Mean?

Watts describe power.

In a charging setup, wattage helps indicate how much charging power compatible equipment can provide or accept.

For example, a power bank may have a large battery capacity but a lower charging output, or a smaller capacity with higher supported charging power.

This is why:

20,000mAh does not automatically charge faster than 10,000mAh.

Capacity and charging speed should be compared separately.

What Does Wh Mean?

Wh means watt-hours and measures stored energy.

Unlike mAh alone, watt-hours also take battery voltage into account.

Wh is particularly important when travelling by air because airline lithium-battery restrictions are generally expressed using watt-hours rather than only mAh.

If you plan to fly with a power bank, check the Wh rating printed on the product and verify the airline's current rules.

Choose a Power Bank for Your Device

Connection type and charging capability should match the device you intend to charge.

Power Banks for iPhone

A portable power bank can be useful for keeping an iPhone charged while commuting, travelling or spending long periods away from a mains socket.

Depending on the iPhone generation and the power bank, charging may use:

• USB-C

• a compatible Apple cable

• wireless charging

Newer and older iPhone models can have different charging connections, so check your exact device.

If you are also comparing phones, browse ourApple iPhones.

Power Banks for Samsung & Android Phones

Many modern Samsung Galaxy and Android smartphones use USB-C charging.

A USB-C power bank can therefore be a convenient portable charging option, but supported charging speed varies between phones.

Do not choose only by the maximum number printed on the power bank.

Check whether your Samsung or Android phone supports the charging standard and power level offered by the portable charger.

Browse ourSamsung devices if you are also shopping for Samsung technology.

Power Banks for Tablets & Other USB Devices

Power banks can also charge many compatible tablets, earphones, smart accessories and other USB-powered devices.

Larger devices may require more power than a typical phone, so check:

• required connector

• device charging requirement

• power bank output

• cable capability

Not every phone-focused power bank will be suitable for every higher-power USB-C device.

Check Power Bank Compatibility Before You Buy

A power bank should match both your device and your charging habits.

Before ordering, check the following.

Capacity

Choose enough stored power for how frequently you expect to recharge away from a mains socket.

Output

Check the power bank's stated charging output if fast charging matters.

Connection

Make sure the power bank provides USB-C, USB-A, wireless charging or another connection compatible with your device.

Cable

Some products include built-in cables, while others require a separate cable.

Wireless support

If you want wireless charging, your phone must support the compatible wireless charging technology.

Number of devices

If you regularly charge several products, consider a multi-output power bank.

Size and weight

Higher-capacity power banks are often less compact than smaller options.

Travel requirements

Check Wh ratings and airline rules before flying with a portable battery.

These checks are more useful than simply choosing the power bank with the highest capacity number.

Can You Take a Power Bank on a Plane?

Power banks contain lithium batteries, so specific aviation rules apply.

In general, portable power banks should be carried in cabin baggage rather than checked luggage, and airline restrictions commonly depend on the battery's watt-hour rating.

The correct approach is to:

• find the power bank's Wh rating

• check the airline's current battery policy

• confirm any approval requirements before travelling

• keep the power bank in cabin baggage where required

Do not assume that every power bank is automatically approved for every flight.

Higher-capacity models deserve particular attention because their stored energy can fall into different airline restriction categories.

For current international guidance, check the official IATA passenger battery guidance before travelling.

Power Bank, Portable Charger or Wall Charger: What Is the Difference?

A power bank is a rechargeable portable battery that stores energy for charging compatible devices away from a mains socket.

A portable charger is a common consumer term for the same type of product.

A wall charger does not normally store power. It takes electricity from a mains socket and supplies it to a connected device.

This means:

Power bank = stores portable energy

while:

Wall charger = supplies mains power

If you need a mains, car or wireless charging unit rather than a portable battery, browse ourPhone Chargers.

If you already have the power source and only need the connection between charger and device, browse ourCharging Cables.

Why Buy Power Banks from Zextons?

Zextons offers portable charging options for different devices, capacities and everyday situations.

You can compare products across features such as:

• 5,000mAh capacity

• 10,000mAh capacity

• 20,000mAh and higher capacities

• USB-C charging

• fast-charging support

• wireless charging

• built-in cables

• multiple outputs

• digital battery displays

• integrated stands

Individual listings show the relevant product specifications, current availability and charging features so you can choose according to your device and requirements.

Zextons also offers free next-day delivery in the UK and a 30-day returns period.

Before ordering, review ourUK Shipping Information and30-Day Returns Policy.

You can also readZextons Customer Reviews when comparing your options.

Frequently Asked Questions About Power Banks

What size power bank do I need?

The right size depends on how often you need portable charging and how much capacity you are comfortable carrying. A 5,000mAh model can suit occasional top-ups, 10,000mAh offers a practical balance for many users, and 20,000mAh or higher can provide more stored capacity for longer periods away from a mains charger.

Is a 10,000mAh or 20,000mAh power bank better?

Neither is automatically better. A 10,000mAh power bank is usually easier to carry, while a 20,000mAh power bank provides more stored capacity but is generally larger and heavier. Choose according to your charging needs and portability preferences.

How many times can a 10,000mAh power bank charge a phone?

There is no universal number. The result depends on the phone's battery capacity, charging efficiency, cable or wireless connection and whether the phone is being used while charging. The power bank's full stated capacity is not transferred to the phone without some energy loss.

Does a higher mAh power bank charge faster?

No. mAh describes battery capacity, not charging speed. Charging speed depends on power output, the supported charging standard, the connected device and the cable or wireless connection.

What is the difference between mAh and watts?

mAh describes battery capacity, while watts describe power. A larger mAh number means more stored charge, whereas a higher supported wattage can allow faster charging when the connected equipment is compatible.

What does Wh mean on a power bank?

Wh means watt-hours and measures stored energy. It is especially important when travelling by air because airline battery limits are commonly based on watt-hours.

Can a power bank fast-charge my phone?

Yes, if the power bank, phone and charging connection support compatible fast-charging technology. A high maximum output on the power bank does not automatically mean every phone will charge at that rate.

Do wireless power banks work with every phone?

No. Your phone must support the wireless charging technology used by the power bank. Phone cases can also affect wireless charging performance or alignment, so check compatibility before ordering.

Can a power bank charge multiple devices at once?

Some power banks can. Models with several USB outputs, built-in cables or wireless charging may support more than one compatible device. Available power can be distributed differently when several outputs are used, so check the individual specifications.

Can I take a power bank on a plane?

Power banks are subject to airline lithium-battery rules and are generally carried in cabin baggage rather than checked luggage. Check the battery's stated Wh rating and your airline's current rules before travelling.

Is a power bank the same as a portable charger?

Yes, in normal consumer use, power bank and portable charger usually describe the same type of rechargeable portable battery pack used to charge devices away from a mains socket.