MagSafe Duo
This little charger was a small bit of novelty fun. I enjoyed it while it lasted, but I can see why it was discontinued.
New Apple accessories no longer use a Lightning cable. However, from the price, charging speed, and fragility of the hinge, to the embarrassingly ill-fitting iPhone 13 Pro; it wasn’t the best charging accessory.
It was unique for travel, but it felt more like an experimental product, designed for dedicated customers who would buy such a thing.
The only similar MagSafe travel charger is the mophie 3-in-1 travel charger, however it is equally as expensive, and looks to have quite a large footprint; folded in a case, or unfolded.
These days with iOS 17's StandBy, Apple is pushing the MagSafe charger and Twelve South Forté stand.
Update: MagSafe Duo may return, but "don't hold your breath."
Link: https://www.macrumors.com/2023/09/12/apple-discontinues-magsafe-battery-pack-and-duo