can someone explain to me exactly whats does this magsafe do  can it been used for iphone and laptop

dont understand what this does and why you would need it


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    The MagSafe connector used to be thicker (pre-2012), when the MacBooks were thicker. This adapter lets you connect an old MagSafe 1 power cord to a newer laptop that only accepts the thinner MagSafe 2 connector.

    It has nothing to do with iOS devices.

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