The Mu plug is a folding USB charger for UK mains sockets. It folds flat for storage.
To use, the wings open.
And the live and neutral pins pivot to form a UK 3-pin plug.
The USB connection is on the reverse of the plug.
Very simple, very elegant and easier to pack than a conventional plug.
In the picture above, I’ve compared it with an Amazon USB plug (top left) and an Apple USB plug (top right). For gram counters, the weights are Amazon 35g, Apple 41g, Mu 42g.
At £25, it’s rather expensive (Apple £15, Amazon £12.99), but it is stylish. It’s only rated for phones and not for tablets. However, intermittently, it will charge my iPad. It is compatible with my Tecknet battery extender. Full details here.
Disclosure: the Mu plug was purchased with my own funds and I have no relationship with the manufacturer