According to Stormin Mormon :
In the modern generation, charge plugs known as "wall warts" are like
coat hangers of the last generation. I've taken to labelling mine with
a sticker and some writing.

The odds of finding similar voltage and plug design is very slight. If
the new device is the same voltage, you can use a charge plug with a
higher available amperage, in most situaitons.

It's not quite "very slight", but it isn't great ;-)

That said, I've become quite annoyed with the whole thing, and am
seriously thinking of building a desk wiring harness that has a single
(possibly 20VAC) supply, with plug in (eg: 1/4" phone jacks
or somesuch) adapters that contain the different voltage/AC-DC/plug
converters.
--
Chris Lewis, Una confibula non set est
It's not just anyone who gets a Starship Cruiser class named after them.