Small(er) charger for Vado SL (48V)

[Borelij]

Anybody knows any small&light charger for Vado SL?

Plan is to go on multiday travel and supplied charger is really big to be carried around ...
.
Also open to DIY solutions ... I noticed GaN chargers for laptops which are considerably smaller - altough not supporting 48V.

Also, charging time - power (W) - is not a problem, plan is to charge overnight...

Thanks!