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Apple’s MagSafe Duo Charger, which was released in 2020, can’t fast charge the new Apple Watch Series 7, the company has confirmed.
“MagSafe Duo Charger doesn’t support fast charging with Apple Watch Series 7. To fast charge your Apple Watch Series 7, use the Apple USB-C Magnetic Fast Charging Cable,” Apple wrote in a support document update on Friday.
The MagSafe Duo Charger uses a standard fast charging puck. Getting fast-charge speeds on the Apple Watch Series 7 requires an updated puck. Apple has yet to update the MagSafe Duo with the necessary hardware.