does the magsafe duo charger need to be plugged in to charge iPhone and apple watch?
Does the magsafe duo charger need to be plugged in to charge iPhone and apple watch?
Question marked as
Yes. It doesn't have it's own battery, it needs power. Also see the following from How to use MagSafe Duo Charger with your iPhone and Apple Watch - Apple Support
Use the included USB-C to Lightning cable to plug in your MagSafe Duo Charger to a recommended 20 watt (W) or greater Apple USB-C power adapter* or a compatible third-party USB-C adapter. You can also connect to a USB-C port on a Mac or PC.