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Anker 621 MagGo Power Bank review

A research-led verdict on the Anker 621 MagGo Power Bank: who it suits, what the published specs mean in practice and where it falls short.

8.3/10 Typical price: £40–£60 Last updated: 6 November 2026
Anker 621 MagGo Power Bank product image
Anker 621 MagGo Power Bank. Image is illustrative; check the retailer for the exact model and finish.
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Verdict

The Anker 621 MagGo is a 10,000mAh power bank designed around a magnet. If you carry an iPhone with MagSafe, the appeal is obvious: the pack snaps to the back of the phone and charges without a cable, so you can keep using the phone while it tops up. The capacity is enough for roughly two phone charges in theory, less in practice after conversion losses, and the 20W USB-C output is fast enough for a modern phone when you use a cable.

The pack is slim enough for a jacket pocket and light enough to carry without thinking about it. The trade-offs are the ones that come with the format. Wireless charging is slower than wired, the magnetic hold can slip with a thick case, and there is only one USB-C port. There is no display, so you are judging the remaining charge by a row of LEDs. Pass-through charging means you can charge the pack and the phone together, which is useful on a desk.

The 621 MagGo is not the pack for a laptop or a camping weekend. It is the pack for the day you forgot to charge your phone, the commute home, the airport queue. If you want a cable-free top-up and you own a MagSafe iPhone, it is a well-made, well-known option. If you need maximum capacity or the fastest wired charging, the 525 PowerCore 20K is the better fit. Check that your phone supports MagSafe before buying; Android phones with a magnetic case will not get the same experience.

What we like

  • Magnetic attachment for iPhone MagSafe
  • 10,000mAh capacity in a slim body
  • 20W USB-C output
  • Pass-through charging

What we do not

  • Wireless charging is slower than wired
  • Magnetic hold can slip with heavier cases
  • Only one USB-C port
  • No display

Key specifications

Capacity10,000 mAh
ChargingUSB-C
DisplayNo
MagSafe supportYes
Output20 W USB-C; 7.5 W wireless
Pass-through chargingYes
Ports1x USB-C

Figures are manufacturer claims unless stated otherwise. We do not present them as independent measurements.

Best for

  • iPhone owners who want a cable-free top-up
  • Commuters who need a slim pack in a pocket or bag
  • Buyers who want a simple, well-known brand

Skip if

  • You need to charge a laptop
  • You want the fastest possible wired charging
  • You use a thick non-MagSafe case

Buying questions

Is the Anker 621 MagGo Power Bank worth it?

At a typical price of £40–£60, the Anker 621 MagGo Power Bank is aimed at iPhone owners who want a cable-free top-up. If that describes you, it is worth considering. Skip it if you need to charge a laptop.

What are the main drawbacks of the Anker 621 MagGo Power Bank?

The main compromises are wireless charging is slower than wired; magnetic hold can slip with heavier cases; only one USB-C port; no display. None of them is unusual for this category and price band, but they are the reasons to think twice before buying.

Who should skip the Anker 621 MagGo Power Bank?

Skip it if you need to charge a laptop; you want the fastest possible wired charging; you use a thick non-MagSafe case. The power banks roundup compares it with the alternative we cover.

Anker 621 MagGo Power Bank vs Anker 525 PowerCore 20K — the head-to-head for this category.