Which charges an iPhone faster?

The UGREEN MagFlow. It does 25W Qi2.2 wireless versus the Anker 621's 12W MagSafe, and it adds 30W wired output the Anker lacks.

Is the UGREEN worth the extra money?

If you want fast wireless charging or need to charge a second device, yes. The UGREEN is $59.98 at Best Buy as of November 7, 2026; check the Anker's current price to see the gap.

Which is thinner in a pocket?

The Anker 621, at 0.45 inches. UGREEN does not list a thickness for the MagFlow, which has a larger multi-device body.

Will the Anker 621 work with an iPhone 17?

Anker lists only iPhone 12 and iPhone 13 Pro. It uses standard MagSafe, so it should attach, but it will not use Qi2.2 speeds.

Neither maker publishes a battery cycle rating. The Anker has more user history at 531 ratings versus 159, but the UGREEN's cooling system should help it run cooler under fast charging.

UGREEN MagFlow Qi2.2 Magnetic Power Bank vs Anker 621 Magnetic Battery

Buy the UGREEN MagFlow if you want fast 25W Qi2.2 wireless charging, a built-in cable, and the ability to charge three devices at once. Buy the Anker 621 if you want a slim, simple MagSafe battery for a 5W-class top-up and don't need wired output. The UGREEN is $59.98 at Best Buy as of November 7, 2026; the Anker 621's price was not provided, so compare it at checkout.

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