Buying guide
Best power banks in the UK
Portable chargers for phones, tablets and travel. Two research-led picks, compared on the things that matter after the first week.
A power bank is insurance. The right one lives in your bag without adding a noticeable weight, charges the phone you actually carry and still has enough left for a second top-up. The two packs here cover the two common shapes: a slim 10,000mAh magnetic pack for iPhone owners who want a cable-free top-up, and a 20,000mAh pack for people who need several charges away from a socket. We look at capacity, output wattage, port count, weight and the small practical details that decide whether a pack comes with you or stays in a drawer. Capacity claims are manufacturer figures; real-world output is always lower after conversion losses.
Our picks, ranked
Best overall
Anker 621 MagGo Power Bank
The Anker 621 MagGo is a 10,000mAh power bank designed around a magnet.
- Magnetic attachment for iPhone MagSafe
- 10,000mAh capacity in a slim body
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Best alternative
Anker 525 PowerCore 20K
The Anker 525 PowerCore 20K is the pack you buy when one charge is not enough.
- 20,000mAh capacity for multiple charges
- 20W USB-C PD output
The owner has not added a tracked retailer link for this product yet. Nothing is broken; the link will appear here when it is added.
Compare the picks
| Specification | Anker 621 MagGo Power Bank | Anker 525 PowerCore 20K |
|---|---|---|
| Typical price | £40–£60 | £40–£60 |
| Editorial score | 8.3/10 | 8.6/10 |
| Best for | iPhone owners who want a cable-free top-up | Travellers who need several days of phone charge |
| Main drawback | Wireless charging is slower than wired | Heavier and bulkier than a 10,000mAh pack |
| Capacity | 10,000 mAh | 20,000 mAh |
| Charging | USB-C | USB-C |
| Display | No | No |
| MagSafe support | Yes | — |
| Output | 20 W USB-C; 7.5 W wireless | 20 W USB-C PD; 2x USB-A |
| Pass-through charging | Yes | Yes |
| Ports | 1x USB-C | 1x USB-C, 2x USB-A |
| Weight | — | Around 350 g |
Buying questions
What are the best power banks overall?
Our top pick is the Anker 621 MagGo Power Bank at a typical price of £40–£60. It is aimed at iPhone owners who want a cable-free top-up. The Anker 525 PowerCore 20K is the alternative for travellers who need several days of phone charge.
How did you choose the best power banks?
We compared published specifications, manufacturer claims and aggregated owner reports. We did not run lab tests. The ranking reflects the trade-offs we think matter most for UK buyers, and every review is dated so you can see how current it is.