Probably not, the WATCH has a special charging head. Apple Watch has wireless charging function, it is Apple's first mobile device with wireless charging function. The Apple Watch uses a MagSafe-style wireless charger. It magnetically attaches to the back of the Apple Watch and is then charged inductive. It's easy to use, no precise alignment is required, you just hold the joint close to the back of the watch, and the magnet in it will automatically snap the joint into place. Although it seems to work the same way as existing wireless chargers on the market, for a wearable device that may need to be charged every day, supporting wireless charging can bring no small convenience.
No, because it's not enough.
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The Apple Watch typically has a 3v battery.
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Then the output voltage of the charger of the Apple Watch should be about 3.3v, and the mobile phone battery is 3.6v to 4.2V.
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Therefore, with the Apple Watch charger (output voltage 3.3v), it is impossible to fully charge the phone battery to 4.2v.
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So with the Apple Watch charger, you can't charge your phone.
deprecated
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First of all, you can responsibly tell everyone that the Apple Watch charger is not recommended to charge the phone, because the power of the watch wireless charger is too small, usually 3W power