Can i use my 30-watt wall adapter of the Macbook Air to Charge Apple Watch series 7?
Can i use my 30-watt wall adapter of the Macbook Air to Charge Apple Watch series 7 or will it be harmful for the Watch’s battery?
Apple Watch Series 7
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Yes.
The Apple Watch will only take what it needs. You can use the 140watt M1 Max Macbook Pro charger if you want. It will not charge any faster that the 20watt, but if it is all that is available, it will work.