Shop by Power Bank Size

Shop by Power Bank Size: 5,000mAh Power Banks, 10,000mAh Power Banks, 20,000mAh Power Banks, 30,000mAh and Over Power Banks.

5,000mAh Power Banks1 product

10,000mAh Power Banks13 products

20,000mAh Power Banks9 products

30,000mAh and Over Power Banks8 products

Shop Shop by Power Bank Size

31 products

10000mAh Emergency Solar Hand Crank Radio with Phone Charger and LED Flashlight

A portable solar and hand crank emergency radio with 10000mAh battery, AM/FM/NOAA reception, LED flashlight and phone charging.

20000mAh Solar Power Bank with Foldable Hand Crank and Detachable Wireless Charger

20000mAh solar power bank with foldable hand crank, detachable wireless charging and dual built-in cables for iPhone, Samsung and other phones.

From £34.99Choose

Solar Power Bank 20000mAh Portable Charger with Built-in Cable

A 20000mAh solar power bank with a built-in charging cable, ideal for camping, travel and emergency backup power.

50000mAh Solar Power Bank with Built-in Cables for iPhone & Android

50000mAh power bank with built-in cables, fast charging and multi-device compatibility for iPhone and Android.

£54.99Choose

50000mAh Solar Power Bank with Hand Crank, USB-A & USB-C

50000mAh solar power bank with hand crank, USB-A and USB-C charging, plus a built-in LED camping light.

4 Solar Panel Power Bank 50000mAh with USB-A, USB-C and LED Camping Light

50000mAh power bank with four solar panels, USB-A and USB-C charging, hand crank and built-in LED camping light.

50000mAh Foldable Solar Power Bank with Dual USB and LED Flashlight

A 50000mAh foldable solar power bank with dual USB output and an LED flashlight, suited to camping and outdoor use.

120W Fast Charging Power Bank with Built-in Cable

A portable 120W power bank with a built-in cable, available in 10000mAh, 30000mAh or 50000mAh capacity for charging iPhone, Huawei, Xiaomi and other phones.

From £35.99Choose

10000mAh Mini Power Bank 22.5W Fast Charging with USB-C to Lightning Cable

Compact 10000mAh power bank with 22.5W fast charging and a Type-C to Lightning cable included.

Baseus 45W Power Bank with Built-In USB-C & Lightning Cables - 10000mAh / 20000mAh

Compact 45W power bank with built-in retractable USB-C and Lightning cables, available in 10000mAh or 20000mAh capacity.

Power Bank for iPhone and Android Phones - 10000/20000/30000/50000mAh

Portable power bank for iPhone and Android phones, available in 10000mAh, 20000mAh, 30000mAh and 50000mAh capacities.

From £33.99Choose

50000mAh Power Bank with 6 Interfaces, Fast Charging for iPhone & Samsung

Large capacity power bank with 6 interfaces and fast charging support for iPhone and Samsung devices.

20000mAh Mini Power Bank with Built-in Cable

Compact 20000mAh power bank with a built-in cable for charging smartphones on the go.

Magnetic Wireless Power Bank Qi2 Ultra Slim, 5000mAh/10000mAh

Ultra slim magnetic wireless power bank with Qi2 fast charging, available in 5000mAh or 10000mAh.

20000mAh Power Bank with Built-in Cables, Ultra Thin Fast Charging Portable Charger

Slim 20000mAh power bank with built-in cables and fast charging for iPhone, Samsung and Xiaomi phones.

Magnetic Wireless Power Bank 10000mAh 22.5W Fast Charging

A slim 10000mAh magnetic wireless power bank with 22.5W fast charging, available in four colours.

Magnetic Wireless Power Bank 10000/20000mAh, 15W Wireless, 20W PD Fast Charge

Slim aluminium alloy power bank with 15W magnetic wireless and 20W PD fast charging, in 10000mAh or 20000mAh.

Magnetic Power Bank PD 22.5W Fast Charger for iPhone Air 17

Magnetic PD 22.5W power bank for iPhone 17 Air, available in 5000mAh, 10000mAh or 20000mAh.

Magnetic Wireless Power Bank with Type-C, 5000mAh/10000mAh for iPhone

Magnetic wireless power bank with Type-C charging for iPhone, available in 5000mAh or 10000mAh.

10000mAh Magnetic Wireless Power Bank, 20W Fast Charging for iPhone

Slim 10000mAh magnetic power bank with 20W wireless charging for compatible iPhones.

Magnetic Wireless Power Bank 5000mAh/10000mAh for iPhone 12-16 Series

Magnetic wireless power bank in 5000mAh or 10000mAh, for cable-free charging of compatible iPhone 12-16 series phones.

Magnetic Wireless Power Bank 20000mAh Fast Charging

Magnetic wireless power bank with 20000mAh capacity for fast, cable-free charging on the go.

Magnetic Wireless Power Bank 10000mAh/5000mAh with PD Fast Charging

Slim magnetic power bank with PD fast charging, wireless output up to 15W, for MagSafe iPhones and Apple Watch.

10000mAh Magnetic Wireless Power Bank - Ultra Thin Fast Charging Battery Pack

Ultra-thin 10000mAh magnetic power bank with fast wireless charging for iPhone, Xiaomi, Samsung and other compatible phones.

Essager 5000mAh Magnetic Wireless Power Bank 20W Fast Charging

Slim 5000mAh magnetic power bank with 20W wireless and USB-C fast charging for iPhone 16, 15, 14 and 13.

3-in-1 Magnetic Wireless Power Bank with LCD Display, 5000/10000mAh

Magnetic wireless power bank with LCD display, 15W Qi2.1 charging and 20W PD fast charging, in 5000mAh or 10000mAh.

From £34.99Choose

10000mAh Solar Power Bank Portable Charger for Outdoor Emergency Use

A 10000mAh solar power bank for charging your phone on the go, ideal for outdoor and emergency use.

Vention 45W 10000mAh Power Bank with Built-In USB-C & Lightning Cables

Pocket-sized 10000mAh power bank with built-in USB-C and Lightning cables, delivering up to 45W fast charging for phones and tablets.

QOOVI 30000mAh Power Bank with Built-in Cable, 22.5W Fast Charging

30,000mAh portable power bank with built-in cable and 22.5W fast charging for iPhone, Samsung and Xiaomi devices.

Baseus 10000mAh Power Bank with Dual Built-In USB-C Cables, 22.5W Fast Charging

A slim 10000mAh power bank with two built-in USB-C cables and 22.5W fast charging for up to 4 devices at once.

£42.99Choose

20000mAh Magnetic Portable Charger, 22.5W Fast Charging Power Bank

A 20000mAh magnetic power bank with 22.5W fast charging for iPhone and Android, no cable included.

Power banks by how much they hold

The number in mAh on a power bank is how much charge it holds, and it is the first thing to decide on, because it sets the size, the weight and how many times it can fill your phone. These pages gather every power bank in the shop by the capacity in its own name and description. Many power banks come in more than one size, chosen on the product's own page; each is listed here under the size in its name.

The four sizes

5,000mAh: a top-up, small enough for a pocket. A little under one full charge of a phone with a 4,000mAh battery.
10,000mAh: the everyday size, about one and a half full charges, still small enough for a coat pocket or handbag.
20,000mAh: for trips, festivals and two phones, about three full charges. More for a bag than a pocket.
30,000mAh and over: for camping, days away from power and power cuts, about five full charges, and heavy.

Why the number is bigger than the charges you get

The mAh on a power bank is measured at its battery cells, which run at about 3.7 volts. A phone charges at 5 volts or more, and raising the voltage costs some energy as heat, as does the phone's own charging. Anker, a large power bank maker, uses an overall figure of about two-thirds in its worked example, and that is where the charges above come from. A phone with a smaller battery gets more; a tablet gets fewer; using the phone while it charges costs more again.

The other figure is watt-hours, the energy in the battery, which airlines use. Multiply the mAh by 3.7 and divide by 1,000: a 10,000mAh power bank is about 37Wh. The guide to power banks has the full table.

Questions people ask about power bank sizes

Which sizes can I take on a plane?

Power banks go in your hand luggage, never in a checked bag. The UK Civil Aviation Authority allows two per passenger, they must not be recharged on board, and each should be in a pouch or its packaging so its sockets cannot touch keys or coins. The limits are in watt-hours: under 100Wh is allowed in the cabin, 100Wh to 160Wh needs the airline's approval, and over 160Wh is not allowed in passenger baggage. A 20,000mAh power bank is about 74Wh, inside the first limit; a 30,000mAh one at 3.7 volts is about 111Wh, so it needs the airline's approval. Check your airline's own rules as well, as some are stricter.

Should I buy the biggest I can?

Buy the biggest that you will really carry. A heavy power bank left at home charges nothing. Many people keep two: a small one for every day and a large one for trips.