Best Portable Power Bank UK 2026: Top Picks for Every Budget
Quick Summary
- Best Overall: Anker 737 Power Bank — Massive 24,000mAh capacity with 140W fast charging and a smart display
- Best Budget: Xiaomi Redmi Power Bank 20,000mAh — Reliable, lightweight, and outstanding value under £25
- Best Premium: Mophie Powerstation Pro XL — Sleek design, 20,000mAh, wireless charging, and aircraft-grade build quality
Whether you’re commuting across London, hiking through the Highlands, or heading to a festival, a reliable portable power bank has become as essential as your phone itself. In 2026, the market is packed with options — from ultra-slim 10,000mAh slabs that slip into a jacket pocket to beefy 27,000mAh powerhouses that can charge a laptop multiple times over. With so many brands and specs to wade through, choosing the right one can feel overwhelming. We’ve tested and researched the very best portable power banks available in the UK this year, covering every price point from budget buys under £25 to premium picks that justify the splurge. Here’s everything you need to know.
What to Look For in a Portable Power Bank
- Capacity (mAh): The milliamp-hour rating tells you how much charge a bank holds. A 10,000mAh bank will charge a typical smartphone roughly two to three times, while 20,000mAh+ is ideal for tablets, multiple devices, or multi-day trips.
- Charging Speed (Wattage): Look for Power Delivery (PD) USB-C ports outputting at least 20W for phones and 65W+ if you want to charge a laptop. Higher wattage means less time tethered to a socket.
- Portability and Weight: A high-capacity bank is only useful if you’ll actually carry it. Check the dimensions and weight — anything over 400g can feel cumbersome in a bag, so balance capacity against convenience for your lifestyle.
- Number and Type of Ports: USB-A ports are widely compatible, but USB-C is faster and more future-proof. Some banks also offer wireless charging, which is brilliant for quick top-ups without fumbling for cables.
Comparison at a Glance
| Product | Price | Best For | Rating |
|---|---|---|---|
| Anker 737 Power Bank | £120 | Power users, laptops & travel | ★★★★★ |
| Xiaomi Redmi Power Bank 20,000mAh | £22 | Budget-conscious everyday use | ★★★★☆ |
| Mophie Powerstation Pro XL | £90 | Style-conscious professionals | ★★★★☆ |
Our Top Picks
Anker 737 Power Bank (PowerCore 24K)
The Anker 737 is the definitive all-rounder for 2026. Packing a 24,000mAh cell and a blistering 140W bidirectional USB-C port, it can charge a MacBook Air from flat in under an hour. Its built-in LCD screen shows exact battery percentage, input/output wattage in real time — a genuinely useful feature that budget rivals don’t offer. It also sports two additional USB-A ports, so you can charge three devices simultaneously. At roughly 660g it’s not featherlight, but the sheer capability more than compensates.
Pros
- 140W fast charging — powers laptops with ease
- Smart LCD display shows live wattage and percentage
- Three ports charge multiple devices at once
Cons
- Heavier than most at 660g — not ideal for ultralight travel
- Premium price point may deter casual users
Xiaomi Redmi Power Bank 20,000mAh
Xiaomi has become the go-to name for no-nonsense budget power banks, and the Redmi 20,000mAh model proves exactly why. For under £25, you get a massive capacity, two USB-A outputs, one USB-C port with 18W fast charging, and a durable matte finish that resists scratches. It charges two smartphones simultaneously without breaking a sweat. Yes, the 18W output won’t rival premium rivals, but for everyday commuters and students who simply need their phone topped up, it’s an exceptional bargain. It weighs 440g — manageable in a bag, though you’ll notice it in a jacket pocket.
Pros
- Outstanding value — huge capacity for the price
- Sturdy build quality that belies its low cost
- Charges two devices simultaneously
Cons
- 18W charging speed lags behind pricier options
- No wireless charging or display screen
Mophie Powerstation Pro XL (20,000mAh)
Mophie’s Powerstation Pro XL targets professionals who refuse to compromise on style or build quality. The rubberised aircraft-aluminium shell feels genuinely premium and the 15W wireless charging pad on the back means you can top up a Qi-compatible phone without ever reaching for a cable. With a 20W USB-C PD output and two USB-A ports, it handles most charging needs comfortably, though it won’t charge a laptop as quickly as the Anker 737. The LED indicator strip is elegant rather than ostentatious. If you want a power bank that looks as good sitting on a boardroom table as it does in your rucksack, this is it.
Pros
- Premium aircraft-aluminium build feels genuinely luxurious
- 15W wireless charging pad — no cable needed for Qi devices
- Compact for its capacity at 335g
Cons
- 20W USB-C output won’t fast-charge most laptops
- Expensive relative to similar-capacity rivals
Who Should Buy This?
If you regularly travel for work, commute by train, or spend long days away from a power socket, a portable power bank is a genuinely life-changing purchase. Frequent flyers and business travellers will get the most from the Anker 737 — its laptop-charging capability means you can arrive at a meeting with a full MacBook and three fully charged phones without ever hunting for a plug. Outdoor enthusiasts heading to festivals, camping trips, or walking holidays will also benefit enormously, particularly from higher-capacity models that can sustain a group for several days.
Students and everyday commuters, on the other hand, are perfectly served by the Xiaomi Redmi. If your primary need is keeping your smartphone alive through a long day of lectures, meetings, or travel, a budget-friendly 20,000mAh bank is more than enough. The Mophie Powerstation Pro XL sits in a sweet spot for tech-savvy professionals who appreciate thoughtful design and the convenience of wireless charging but don’t necessarily need laptop-level power output. Whatever your lifestyle, there’s a power bank on this list built for you.
Final Verdict
The best portable power bank in the UK in 2026 for most people is the Anker 737. Its combination of enormous capacity, blistering 140W fast charging, real-time LCD readout, and rock-solid build quality makes it the definitive all-rounder. If budget is your primary concern, the Xiaomi Redmi 20,000mAh offers astonishing value and will cover the vast majority of everyday charging needs at a fraction of the cost. Those who prioritise aesthetics and wireless charging convenience should look seriously at the Mophie Powerstation Pro XL. Whichever you choose, any of these three will keep your devices charged and your day running smoothly.
Frequently Asked Questions
What is the best portable power bank in the UK in 2026?
The Anker 737 Power Bank is our top pick for 2026, thanks to its 24,000mAh capacity, 140W fast charging, and smart LCD display. For those on a tighter budget, the Xiaomi Redmi 20,000mAh offers exceptional value and is one of the best-selling power banks in the UK this year.
Can I take a portable power bank on a plane from a UK airport?
Yes, but with restrictions. The Civil Aviation Authority and most airlines permit power banks in hand luggage only — they must not be placed in checked hold baggage. Most airlines cap capacity at 100Wh (roughly 27,000mAh at 3.7V) per bank, though some allow up to 160Wh with airline approval. Always check with your specific carrier before flying.
How many times will a 20,000mAh power bank charge my phone?
A 20,000mAh power bank will typically charge a modern smartphone (with a battery of around 4,000–5,000mAh) between three and four times. Real-world figures are slightly lower due to heat loss and conversion inefficiency, so expect roughly 70–80% of the rated capacity to reach your device in practice.
Is it safe to charge a phone overnight with a power bank?
Generally yes, provided you use a reputable brand with built-in overcharge protection — all three products in this guide include this safety feature. Once your device reaches 100%, the power bank’s circuitry stops the flow of current automatically. That said, it’s best practice to charge on a hard, flat surface rather than a bed or sofa to prevent heat build-up.
Can a portable power bank charge a laptop?
Yes, provided the power bank has a USB-C Power Delivery (PD) port with sufficient wattage. Most modern laptops require at least 45–65W to charge at a reasonable speed; the Anker 737’s 140W output can charge most laptops impressively quickly. Budget banks with only 18–20W USB-C will charge a laptop very slowly or simply maintain its current battery level rather than increasing it.