Best Power Bank UK 2026: UGREEN vs EcoFlow vs Belkin (20,000mAh, Magnetic and Laptop Power Banks)
A power bank keeps your phone, tablet or even laptop going away from a socket. Three things decide which one you need: capacity (mAh), charging speed (watts) and how it connects (built-in cable or magnetic). This guide compares power banks from UGREEN, EcoFlow and Belkin and Trust at Box.co.uk, with today's prices.
UGREEN offers today
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39% Off the UGREEN Nexode 100W 4-Port Charger
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37% Off the UGREEN Nexode 25000mAh 145W Power Bank
EcoFlow offers today
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EcoFlow STREAM Series 5% Off Coupon
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EcoFlow 5% Off Coupon-UK
Box.co.uk offers today
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£10 Off When You Spend £200
45% OFF
Upgrade with the Latest Component Deals. Save Up to 45%
Quick comparison
| Power bank | Shop | Capacity | Fastest output | Price today |
|---|---|---|---|---|
| UGREEN Nexode Power Bank 45W, built-in cable | UGREEN | 20,000mAh | 45W | £29.99 |
| UGREEN Nexode Power Bank 67W, built-in cable | UGREEN | 20,000mAh | 67W | £42.99 |
| EcoFlow RAPID Power Bank 20K, built-in cable | EcoFlow | 20,000mAh | 45W | £33.47 |
| Belkin BoostCharge 20000 | Box.co.uk | 20,000mAh | see listing | £34.02 |
| EcoFlow RAPID Mag Qi2.2 (magnetic) | EcoFlow | 10,000mAh | 25W wireless, 36W cable | £53.99 |
| UGREEN Nexode Laptop Power Bank, 4-port | UGREEN | 25,000mAh | 200W | £64.99 |
How to choose a power bank
- Capacity: 10,000mAh charges most phones about twice; 20,000mAh about four times and suits travel. Some energy is lost in charging: UGREEN says its 5,000mAh MagFlow Air delivers about 3,000mAh to your phone.
- Watts: 20–25W is fine for phones; 45W and up charges tablets and some laptops; 100W and more is for laptops.
- Built-in cable: nothing to forget. Magnetic (Qi2): snaps to the back of recent iPhones and charges wirelessly.
Best 20,000mAh power banks
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-0%
-27%+ Extra 5% off with code
EcoFlow RAPID Power Bank (20K, 45W, Built-in Cable)
£33.47 £45.99
about £31.80 with code
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- UGREEN Nexode 20,000mAh 45W: a built-in USB-C cable and three outputs. UGREEN says most Android phones charge at up to 45W, and the total drops to 15W when you use two or three ports at once.
- UGREEN Nexode 20,000mAh 67W: the same idea with a faster 67W maximum.
- EcoFlow RAPID 20K: a built-in 45W USB-C cable, a 0.75-inch slim body and a digital battery display. EcoFlow says it gives up to 3.87 charges of an iPhone 17 and charges one to 50% in 22 minutes.
- Belkin BoostCharge 20000 mAh at Box.co.uk.
Best magnetic power banks for iPhone
-40%+ Extra 5% off with code
EcoFlow RAPID Mag Qi2.2 Magnetic Power Bank (10,000mAh, 25W, Built-in USB-C Cable)
£53.99 £89.99
about £51.29 with code
Get code & shop ↗
-18%
-27%
UGREEN Nexode Magnetic Wireless Power Bank (10,000mAh, 20W USB-C PD, MagSafe-Compatible)
£21.99 £29.99
- EcoFlow RAPID Mag Qi2.2: 25W Qi2.2 wireless charging, a built-in 36W USB-C cable, three devices at once and an 11N magnetic grip. EcoFlow says its 10,000mAh charges an iPhone 16 up to 1.9 times.
- UGREEN MagFlow Air 5,000mAh (Qi2 15W): a small magnetic pack for a top-up during the day.
- UGREEN Nexode Magnetic Wireless 10,000mAh: MagSafe-compatible with 20W USB-C PD.
Best laptop power banks
-19%
UGREEN Nexode Laptop Power Bank (25,000mAh, 200W, Built-in USB-C Cable, 4-Port)
£64.99 £79.99
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- UGREEN Nexode Laptop Power Bank 25,000mAh: 200W across four ports with a built-in USB-C cable, enough to charge a laptop and a phone together.
- Trust Laro 100W Laptop Power Bank at Box.co.uk.
Can you take a power bank on a plane?
Usually yes, but only in hand luggage, never in checked bags, and most airlines allow power banks up to 100Wh without asking. A 20,000mAh power bank is roughly 74Wh and a 25,000mAh one about 92Wh (at the standard 3.7V cell voltage). Rules differ by airline, so check yours before you fly.
Codes and deals
Check the codes box at the top of this guide before you buy: it lists the codes and deals live today at UGREEN, EcoFlow and Box.co.uk. A sitewide code takes money off everything in this guide from that shop; some codes only work on certain products or above a minimum spend, and the shop's checkout shows the final price.
FAQs
What is the best power bank in the UK?
For most people a 20,000mAh power bank with a built-in USB-C cable, such as the UGREEN Nexode 45W or EcoFlow RAPID 20K. For iPhones, a magnetic Qi2 power bank like the EcoFlow RAPID Mag; for laptops, the UGREEN 25,000mAh 200W.
How many times will a 20,000mAh power bank charge my phone?
Roughly three to four times for a typical phone. EcoFlow says its RAPID 20K gives up to 3.87 charges of an iPhone 17.
Can a power bank charge a laptop?
Yes if it has enough watts and a USB-C port your laptop charges from. The UGREEN Nexode Laptop Power Bank gives up to 200W and the Trust Laro 100W is made for laptops.
Can I take a 20,000mAh power bank on a plane?
Usually, in hand luggage only: at about 74Wh it's under the 100Wh limit most airlines use. Check your airline's rules before you fly.
How we checked this guide
Every product fact in this guide comes from the brand's own product description, checked on 20 October 2026, and UGREEN's, EcoFlow's and Box.co.uk's product pages (capacity, output, cables, magnetic charging). Prices are read on each store's own product page every night; the store's checkout shows the final price. We haven't tested these products ourselves, so we don't rate them: we compare what each brand says it does.
Links to stores in this guide are affiliate links: we may earn a commission when you buy through them, at no extra cost to you. Affiliate disclosure
Sources: uk.ugreen.com/products/nexode-power-bank-20000mah-45w-built-in-cable · uk.ugreen.com/products/nexode-power-bank-20000mah-67w-built-in-cable · uk.ugreen.com/products/nexode-laptop-power-bank-25000mah-200w-4-port · uk.ugreen.com/products/magflow-air-magnetic-power-bank-5000mah-qi2-15w · uk.ugreen.com/products/nexode-magnetic-wireless-power-bank-10000mah-20w · uk.ecoflow.com/products/ecoflow-rapid-10k-45w-retractable-cable-power-bank · uk.ecoflow.com/products/ecoflow-rapid-20k-45w-built-in-cable-power-bank · uk.ecoflow.com/products/rapid-mag-power-bank-10000mah-qi2-2-25w-built-in-cable · box.co.uk/bpb012btbk-belkin-boostcharge-20000-mah-power-bank · box.co.uk/25240-trust-laro-100w-laptop-power-bank-black
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