Portable Chargers · Every Capacity Compared · 2026

Best Portable Chargers UK 2026 — Portable Phone Charger Guide

The complete portable charger guide for 2026. Whether you call it a portable power bank, portable cell charger, or simply a battery pack — we compare every capacity from pocket-sized 5,000mAh to laptop-charging 25,000mAh, all with free UK delivery.

See Top PicksCapacity Guide FAQs

What Is a Portable Charger?

A portable charger is a rechargeable battery pack that stores energy so you can charge your phone, tablet, laptop, earbuds, or any USB device on the go — no wall outlet needed. You might also hear them called power banks, portable power banks, battery packs, or portable cell phone power banks. They all mean the same thing.

In 2026, the best portable chargers offer USB-C Power Delivery (PD) fast charging with outputs up to 140W — enough to charge a MacBook Pro at full speed. Capacities range from a slim 5,000mAh pocket charger to a 25,000mAh laptop-grade portable power bank, and every option under 100Wh is airline-approved for carry-on luggage.

140W

Max output — fast-charges laptops and phones

25,000mAh

Largest airline-approved capacity (90Wh)

2 hrs

Fastest recharge time (65W USB-C input)

Portable Charger vs Power Bank — Is There a Difference?

No. A portable charger and a power bank are exactly the same product. Both describe a rechargeable battery you carry to charge devices without a wall socket. The terms are interchangeable — “power bank” is more common in the UK, while “portable charger” is widely used in search and marketing. Other synonyms include battery pack, external battery, and portable cell charger.

Already browsed our main guide? See the full Power Bank Guide for brand comparisons (Anker, UGREEN, Baseus, Belkin) and more product reviews.

Portable Charger Capacity Guide

What size portable charger do you actually need? Here is a breakdown by capacity, weight, and use case to help you choose the right portable power bank.

Pocket Portable Charger

5,000mAh

~1 phone charge

Best for: Emergency top-ups, gym, daily carry

Weight: 100–150g

Price: £10–20

Standard Portable Charger

10,000mAh

~2–3 phone charges

Best for: Commuting, day trips, festivals

Weight: 200–250g

Price: £15–30

High-Capacity Portable Charger

20,000mAh

~4–6 phone charges

Best for: Travel, multi-device, tablets

Weight: 350–500g

Price: £25–50

Need a laptop-grade portable charger (25,000mAh+)? See our full power bank guide which covers laptop capacity tiers in detail.

In Stock · Free UK Delivery · 2-Year Warranty

Best Portable Chargers 2026 — Our Top Picks

We have tested dozens of portable chargers. These are the two we recommend for anyone who needs a high-capacity, fast-charging portable power bank.

Best for LaptopsUGREEN
4.9/5

UGREEN 25000mAh 145W Portable Charger

£79.99

Capacity

25,000mAh (90Wh)

Output

140W USB-C (max)

Input

65W USB-C

Weight

513g

  • 140W output — charges MacBook Pro in under 2 hours
  • 65W USB-C input — full recharge in just 2 hours
  • 3 ports — charge laptop + phone + earbuds at once
  • LED digital display — real-time wattage & battery level
  • PD 3.1 + QC 3.0 — universal fast charging
  • 90Wh — airline approved (under 100Wh limit)

Our Verdict

The UGREEN 25,000mAh 145W is the best high-capacity portable charger you can buy. With 140W output it charges a MacBook Pro 14" from 0–50% in about 30 minutes, and 65W input means the portable charger itself recharges in just 2 hours. Three ports let you charge your entire setup simultaneously. At £79.99 with free UK delivery, it offers outstanding value for a laptop-grade portable charger.

Buy at SmartGear — £79.99Shop UGREEN
Best for TravelUGREEN
4.8/5

UGREEN Nexode 20000mAh 130W Portable Charger

£69.99

Capacity

20,000mAh (72Wh)

Output

100W USB-C (max)

Input

65W USB-C

Weight

476g

  • 100W laptop charging — MacBook Pro 16" 43% in 30 mins
  • TFT digital display — voltage, current & port power
  • 72Wh — well within airline 100Wh limit
  • Compact at 476g — lighter than most 20K portable chargers
  • 130W total output across 3 ports
  • Works with MacBook, iPad, iPhone, Galaxy, Switch & Steam Deck

Our Verdict

The UGREEN Nexode 20,000mAh 130W hits the perfect balance of capacity, power, and portability for travellers. At 476g it is genuinely travel-friendly, the 100W output handles laptops with ease, and the TFT display is a premium touch. 72Wh means zero airline hassle. This is the portable charger we recommend for frequent flyers and digital nomads.

Buy at SmartGear — £69.99Shop UGREEN
Browse All Power Banks

How to Choose the Right Portable Charger

Beyond capacity, these features separate a good portable charger from a great one. Here is what to look for before you buy.

Check Output Wattage First

Look for at least 20W USB-C PD output to fast-charge phones. For laptop charging, you need 65W or higher. The output wattage is the single most important spec on any portable charger.

USB-C Input Saves Hours

A portable charger with USB-C PD input (18W+) recharges 3-4x faster than Micro-USB. A 10,000mAh charger recharges in 3 hours via USB-C versus 8+ hours via Micro-USB.

Safety Certification Matters

Only buy portable chargers with CE and UKCA markings for UK use. Quality brands like UGREEN and Anker include overcurrent, overvoltage, short-circuit, and temperature protection.

Real Capacity Is ~65-70%

Advertised capacity is the raw cell rating. Real-world output is about 65-70% due to voltage conversion losses. A 10,000mAh portable charger delivers roughly 6,500-7,000mAh to your phone.

USB-C to USB-C Cables

To get the fastest charge from your portable charger, use a USB-C to USB-C cable rated for the charger's output wattage. A cheap cable can bottleneck a 100W portable charger to 15W.

Passthrough Charging

Passthrough lets you charge the portable charger and your phone at the same time from one wall outlet. Useful in hotels or airports with limited sockets.

Taking a Portable Charger on a Plane

Flying with a portable charger? The rules are straightforward, but getting them wrong could mean your charger gets confiscated at security.

Under 100Wh (up to ~27,000mAh)

Allowed in hand luggage — no approval needed

100–160Wh (27,000–43,000mAh)

Requires airline approval — contact them before flying

Over 160Wh (43,000mAh+)

Banned on all commercial flights

Checked luggage

Portable chargers are NEVER allowed in checked bags

Quick calculation: Wh = mAh x V / 1000. A 20,000mAh portable charger at 3.7V = 74Wh (well under 100Wh). Both our UGREEN 25,000mAh (90Wh) and UGREEN 20,000mAh (72Wh) portable chargers are fully airline approved.

Who Needs a Portable Charger?

A portable charger is essential for anyone who uses their phone heavily throughout the day. Here are the most common use cases.

Commuters & Students

A 10,000mAh portable charger fits in a jacket pocket and gives you 2–3 full charges. Enough for a full day of navigation, music streaming, and messaging without worrying about running flat.

Recommended: 10,000mAh with 20W USB-C PD

Travellers & Holidaymakers

Long flights, layovers, and full-day sightseeing drain your phone fast. A 20,000mAh portable charger gives you 4–6 charges — enough for a full weekend trip without finding a wall outlet.

Recommended: 20,000mAh with 65W+ USB-C PD

Remote Workers & Digital Nomads

Working from cafes, co-working spaces, or outdoors? A 25,000mAh portable charger with 100W+ output charges your laptop, phone, and earbuds simultaneously from a single device.

Recommended: 25,000mAh with 100W+ USB-C PD

Festival & Event Goers

Multi-day festivals and outdoor events rarely have charging points. A portable charger keeps your phone alive for photos, maps, contactless payments, and staying in touch with your group.

Recommended: 10,000–20,000mAh for multi-day events

Portable Charger FAQs

Common questions about portable chargers, capacity, airline rules, and charging.

What is a portable charger?
A portable charger is a rechargeable battery pack you carry to charge your phone, tablet, laptop, or any USB device on the go — without needing a wall outlet. "Portable charger" and "power bank" mean exactly the same thing. They're also called battery packs, external batteries, or portable power banks. In 2026, the best portable chargers offer USB-C Power Delivery fast charging and capacities from 5,000mAh to 25,000mAh.
What size portable charger do I need for my phone?
Most smartphones have 3,000–5,000mAh batteries. A 5,000mAh portable charger gives about 1 full charge — ideal for emergency top-ups. A 10,000mAh portable charger gives 2–3 full charges, which is the sweet spot for daily commuters. A 20,000mAh portable charger gives 4–6 charges and is best for travel or charging multiple devices. For laptop charging, look at 25,000mAh models with 100W+ output.
Can I take a portable charger on a plane?
Yes, but only in hand luggage — portable chargers are banned from checked baggage on all airlines. Most airlines allow portable chargers up to 100Wh (approximately 27,000mAh at 3.7V) without approval. Chargers between 100–160Wh require airline approval. Over 160Wh is banned entirely. A typical 20,000mAh portable charger is 74Wh — well within limits. Always check your specific airline's policy before flying.
How long does a portable charger take to recharge?
Recharge time depends on capacity and input speed. A 10,000mAh portable charger takes about 2–3 hours with 18–20W USB-C PD input, or 6–8 hours with old 5W Micro-USB input. A 20,000mAh charger takes 4–5 hours via USB-C PD. The UGREEN 25,000mAh 145W recharges in just 2 hours with a 65W adapter. Always buy a portable charger with USB-C PD input for dramatically faster recharging.
Is a portable charger the same as a power bank?
Yes — "portable charger" and "power bank" are different names for exactly the same product. Both refer to a rechargeable battery pack you carry to charge devices on the go. "Power bank" is more common in the UK and globally, while "portable charger" is widely used in marketing and search. Other names include battery pack, external battery, and portable power bank. They all describe the same device.
What is the best portable charger brand?
The best portable charger brands in 2026 are UGREEN and Anker. UGREEN leads for high-capacity portable chargers with 130–145W output that can charge laptops, phones, and tablets simultaneously. Anker's PowerCore range is the world's best-selling for everyday phone charging — compact, reliable, and affordable. Both brands offer CE/UKCA safety certification, USB-C PD fast charging, and airline-approved capacities.
Can a portable charger charge a laptop?
Yes, but you need a portable charger with at least 45W USB-C Power Delivery output — and ideally 65W or higher. Most standard portable chargers (20W output) can only charge phones and tablets. The UGREEN 25,000mAh 145W portable charger delivers 140W output, enough to charge a MacBook Pro at full speed. The UGREEN Nexode 20,000mAh 130W offers 100W output for laptop charging in a more compact form.
How do I charge a portable charger?
Plug your portable charger into a wall charger using a USB-C cable. For the fastest recharge, use a USB-C PD wall charger rated at 18W or higher. Most modern portable chargers have USB-C input — avoid models that only accept Micro-USB, as they recharge 3–4 times slower. An LED indicator or digital display will show the charging progress. A full recharge typically takes 2–5 hours depending on capacity.

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