Nevertheless, have anyone succeeded in saving battery power?

[PocketPCfun]

I have tried more than 20 color schemes using the CETuner utility (http://pocket-pc-software.penreader.com/CETuner_2002.html), but there is no noticeable result, like that:

http://www.penreader.com/screenshots/cetuner/graph.gif

Have any succeeded? I own NEC MobilePro 200e.