To my surprise, it is indeed possible! … … An xda-developers forum contributor with the nick name Adenin came with a nice tweak that can change the FM band range in HTC Artemis. The registry modifications are the following:

HKLM\SOFTWARE\HTC\FMRadio\FMPlayer\Band
0 = 87.5 – 108.0 MHz
1 = 76.0 – 108.0 MHz
2 = 76.0 – 91.0 MHz

You can also set frequency direct in HKLM\SOFTWARE\HTC\FMRadio\FMPlayer\ChannelValue = MHz * 10 (=> 1100 = 110.0 MHz )

Source: xda-developers

While browsing the WindowsMobile blog archive, I found two articles describing what component or part of your PDA and smartphone (i.e. touchscreen, backlight, CPU, LED etc.) drains your battery most. Both articles are available here and here. The latter one also describes the difference in power management of smartphones and PDA’s. Very interesting readings …