Charger

If you have a more modern USB-C PD charger from your old MBP you can keep it to use with your new MBP. Apple states that if you include the charger in the box it will be recycled for you. The inclusion of the brick does not change the quoted $ value …

MyriamH4 Said:

"Charger: When trading in my Mac, should I include the charger?"

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Not Required:

Adding the power adapter is not required, when trading it in. So, I would just send it in, having no use for it anymore. You should consider the same.