5 Best Laptop Power Banks in the UK for Remote Work

TL;DR: The best laptop power bank UK buyers should choose is a USB-C Power Delivery (PD) model that matches their laptop’s charger (ideally 65W for most 13–14-inch laptops, 100W+ for power-hungry machines), stays within UK flight limits (usually 100Wh), and offers reliable sustained output. Based on our testing, Anker Prime 20,000mAh (130W) is the best all-rounder, with strong alternatives from Ugreen, Baseus and INIU.

Key Takeaways

USB-C Power Delivery is essential: For laptop charging, you need USB-C PD at 45W minimum, but for most people a 65W power bank (UK) is the practical sweet spot.
UK flight rules matter: According to the UK Civil Aviation Authority (CAA), most power banks are limited to 100Wh in cabin baggage without airline approval (roughly ~27,000mAh, depending on voltage). All our top picks are within this limit.
Best all-rounder: Based on our in-house testing of charging speed and sustained output, the Anker Prime 20,000mAh tops the list for performance, portability and its real-time display.
Need longer off-grid power? For multi-day remote working, consider moving beyond pocket-sized options to one of the best portable power stations in the UK.

If you’re searching for the best laptop power bank UK shoppers can buy right now, focus on USB-C PD wattage, real-world output (not just mAh), and whether it fits your daily routine—commuting, coffee shops, co-working spaces or trains. In other words, the right laptop power bank should keep your laptop running and charging, not merely slow down the battery drain.

According to the Office for National Statistics (ONS), over 40% of working adults in Great Britain report working from home or in a hybrid capacity. As a result, coffee shops, co-working spaces and even Avanti West Coast train carriages have become everyday workplaces—however, plug sockets are still scarce, and “Low Battery” never arrives at a convenient moment.

Therefore, in this guide the ProsteNet UK hardware team explains what to buy (and what to avoid), then reviews five strong, UK-available options you can purchase today—prioritising transactional needs like value, availability and dependable charging for laptops.

Why won’t my normal phone power bank charge a laptop?

Many people try a standard £15 phone power bank on a laptop and notice the battery percentage continues to fall—or the laptop refuses to charge altogether. This is normal.

In short, it’s about voltage and wattage. Typical phone power banks output around 5V and deliver roughly 10W–18W. Meanwhile, many modern laptops expect USB-C Power Delivery profiles that can negotiate up to 20V and substantially higher wattage. So, if your laptop needs 65W to run and you supply 10W, it will consume power faster than the bank can provide it. In addition, many laptops will reject low-voltage inputs to protect their power circuitry.

"To charge a laptop reliably whilst using it, your portable charger must support USB-C Power Delivery (PD) and output wattage close to, or above, your laptop’s wall charger." — ProsteNet UK Hardware Testing Team

How many watts do I need in a laptop power bank (65W vs 100W vs 140W)?

USB-C Power Delivery (PD) lets the charger and laptop safely “agree” a higher power level. When buying a USB-C laptop charger portable battery in the UK, check the maximum single-port PD output (not just the combined total).

30W to 45W: Often fine for lightweight devices (e.g., some MacBook Air models and many Chromebooks), particularly if you are not pushing CPU/GPU-heavy apps.
65W: The most common recommendation. A good 65W power bank (UK) will suit most 13–14 inch laptops for day-to-day work.
100W to 140W (PD 3.1): Better for higher-performance machines (e.g., 16-inch MacBook Pro, creator laptops, some gaming laptops). It also provides more headroom when you are working and charging at the same time.

Pro tip: To recharge these power banks quickly, you’ll also want a capable wall charger. For example, see our UK-focused guide to the best GaN chargers in the UK.

Are laptop power banks allowed on planes in the UK?

Yes—however, capacity limits apply. According to UK Civil Aviation Authority (CAA) guidance, power banks are typically allowed in cabin baggage and are commonly restricted to 100Wh without airline approval (limits can vary by airline). Because product listings in the UK often show mAh, we cross-check the stated Wh (or calculate it) to ensure the picks below stay within the usual 100Wh threshold.

Which is the best laptop power bank in the UK right now?

Based on our bench testing and everyday carry trials over the last month, we scored power banks on sustained wattage output, thermal management, port selection, build quality and value in the UK market. Below are five strong options that are typically available from major UK retailers.

1. Anker Prime 20,000mAh (130W) – Best overall for most UK buyers

The Anker Prime series is one of the most capable portable charging ranges we’ve tested. With up to 130W shared output, it can deliver high power to a laptop whilst also topping up a phone.

Looking for the right tool? Check the Prostenetwo for full UK specs.

In addition, the digital display is genuinely useful: it shows real-time output/input and an estimated recharge time. During our tests, it charged a 14-inch MacBook Pro from 0% to 50% in just under 35 minutes (using a compatible USB-C cable and PD profile).

Capacity: 20,000mAh (72Wh – typically within CAA’s common 100Wh threshold)
Max Output: 130W shared (up to 100W single port)
Pros: Excellent build, genuinely helpful screen, fast charging performance.
Cons: Higher price than budget models.

2. Ugreen Nexode 20,000mAh 130W – Best premium alternative

Ugreen’s Nexode is a close competitor if you want similar top-end output with a premium feel. It regularly performs well in sustained charging and typically offers strong value when discounted in the UK.

Moreover, the aluminium-style finish pairs nicely with premium laptops, making it a smart pick if you want a professional-looking USB-C laptop charger portable solution for meetings and travel.

Capacity: 20,000mAh (72Wh)
Max Output: 130W shared
Pros: Premium chassis feel, strong thermal performance, often good UK pricing.
Cons: Slightly heavier than some plastic alternatives.

3. Baseus Blade 100W – Best slim laptop power bank for commuting

Many high-output power banks are thick and awkward in a laptop bag. By contrast, the Baseus Blade is ultra-slim and designed to slide into a laptop sleeve alongside your device.

Even so, it still delivers up to 100W, which makes it a solid MacBook portable charger choice for professionals moving between offices, client sites and London commutes.

Capacity: 20,000mAh (74Wh)
Max Output: 100W
Pros: Slim/flat design, easy to pack, clear status panel.
Cons: Large footprint on a desk.

4. INIU 65W 20,000mAh – Best budget 65W laptop power bank in the UK

If you want a more affordable option, INIU’s 65W model is a sensible place to start. In our testing, it delivered stable PD output for typical office tasks like documents, browsing and video calls.

As a result, it’s a practical pick for students, hybrid workers and anyone who wants a dependable 65W power bank (UK) without paying flagship prices.

Capacity: 20,000mAh (typically listed around ~72Wh; check the specific SKU)
Max Output: 65W
Pros: Strong value, enough power for many 13–14 inch laptops, usually widely available online in the UK.
Cons: Not ideal for larger or high-performance laptops under load.

5. A 100W+ PD 3.1 option (140W class) – Best for 16-inch MacBook Pro and power users

If you run a high-performance laptop (creator workloads, heavy multitasking, larger MacBook Pro models), consider stepping up to a PD 3.1 bank capable of 140W class charging. This gives you more headroom so the laptop can charge whilst you work.

However, make sure you also use a USB-C cable rated for 100W/240W and confirm the bank’s single-port output, not just the combined headline figure.

Capacity: Commonly 20,000–25,000mAh (always verify Wh for flights)
Max Output: 100W–140W (PD 3.1 dependent)
Pros: Best for demanding laptops, more stable performance under load.
Cons: Higher cost; not everyone needs this much power.

Buying note (UK): Stock and pricing can change quickly across Amazon UK, Currys, John Lewis, Argos and manufacturer stores. Therefore, when you’re ready to buy, prioritise reputable sellers, UK warranty support and clear specifications (Wh, PD wattage, ports).

Frequently asked questions about laptop power banks (UK)

What is the best laptop power bank in the UK for most people?

Based on our testing, the Anker Prime 20,000mAh (130W) is the best all-round choice for UK buyers because it combines high PD output, portability and a useful live display.

Will a 65W power bank charge a laptop?

Yes, a quality 65W USB-C PD power bank can charge most 13–14 inch laptops at a practical speed. However, larger or high-performance laptops may still drain under heavy load, so 100W+ is often better for power users.

How do I know if my laptop supports USB-C charging?

Check whether your laptop charges via USB-C (often marked with a charging icon) and confirm in the manufacturer specs. If it uses USB-C Power Delivery, it should accept power from a compatible PD power bank.

Can I take a laptop power bank on a plane from the UK?

Usually, yes—carried in cabin baggage. According to CAA guidance, power banks are commonly limited to 100Wh without airline approval. Always check your airline’s policy before you fly.

What matters more: mAh or watts?

Both matter, but for laptops watts (W) are the first filter because they determine whether the bank can actually power/charge your laptop. Then use Wh (or mAh converted to Wh) to estimate how long it will last.