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Anker 621 MagGo Power Bank vs Anker 525 PowerCore 20K

The Anker 621 MagGo and Anker 525 PowerCore 20K are both Anker packs, but they solve different problems. The MagGo is a slim magnetic top-up for a phone; the 525 is a larger reserve for a weekend or a household. The choice is about weight and convenience versus total capacity.

Last updated: 6 November 2026

Specs side by side

SpecificationAnker 621 MagGo Power BankAnker 525 PowerCore 20K
Typical price£40–£60£40–£60
Editorial score8.3/108.6/10
Best foriPhone owners who want a cable-free top-upTravellers who need several days of phone charge
Main drawbackWireless charging is slower than wiredHeavier and bulkier than a 10,000mAh pack
Capacity10,000 mAh20,000 mAh
ChargingUSB-CUSB-C
DisplayNoNo
MagSafe supportYes—
Output20 W USB-C; 7.5 W wireless20 W USB-C PD; 2x USB-A
Pass-through chargingYesYes
Ports1x USB-C1x USB-C, 2x USB-A
Weight—Around 350 g

Our verdict

Buy the 621 MagGo if you carry an iPhone and want a slim, cable-free top-up that disappears into a pocket or small bag. Buy the 525 PowerCore 20K if you need multiple full charges, travel with more than one device or want a pack that can sit in a rucksack for a weekend. The MagGo is the everyday carry; the 525 is the trip pack.

Choose the Anker 621 MagGo Power Bank if…

  • 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

Choose the Anker 525 PowerCore 20K if…

  • Travellers who need several days of phone charge
  • Festival-goers and campers
  • Households that want one pack for multiple devices

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