power manager in 4.2

[Jonathan Riddell]

What power management applet to include in 4.2?

guidance-power-manager is working well, but still has polling, doesn't
use solid and lacks a plasmoid.

kde4powersave seems to work too.  I'm not convinced the UI is as
simple but it seems to be working well and uses solid, plasma and is
c++.

There's also powerdevil which I couldn't get to load in Plasma.

Jonathan