Apple's MagSafe Duo, which comes without power adapter, isn't compatible with Apple's 29W adapter

Here's the problem with shipping phones and other gadgets, which inevitably must be plugged into a socket at some point, without a power adapter: technology advances, standards change, and often times your old power adapter won't work with the new device. 

Case in point: Apple's own MagSafe Duo charger, which (amazingly, for a charger) comes without a power adapter, isn't compatible with Apple's old 29W, USB-C power adapter. I say "old" but it's not really that old — it was replaced by a 30W power adapter in 2018. So there's actually quite a big chance that you still have a 29W power adapter which you won't be able to use with the MagSafe Duo. Read more...