battery monitor applet in kde4.6 beta 2 not working

I’ve installed openSUSE 11.3 updated to KDE 4.6 Beta 2 on an Acer Aspire One.

To my surprise and delight and without my intervention, for the first time ever the battery applet is now all singing all dancing; showing charge state including a little red bar when charge is low.

However on a MSI Mega Book, x86_64 architecture, I don’t get the same level of joy, only an indication seemingly determined at log in, that the AC adaptor is plugged in (which unfortunately remains, even if I unplug the adaptor).

Other than architecture I can’t spot the difference between the two installs.

May I ask if anyone has any ideas?