DRM encoding eats as much as 25% of battery life

"Well, as if that isn't enough, we now discover another problem with DRM that is very intuitive. "... according to tests conducted by CNET, they found that while many players met or exceeded their claims, one feature that has a drastic affect on battery life is the infamous DRM." There was a drop in one test from 16hrs battery playback to 12 hrs playback just changing from mp3 files to WMA 10 DRM files. True, the test doesn't seem to take into account the effects of non-DRM'd mp3 versus non-DRM'd WMA, but one would suspect that the extra processing required for DRM unencoding. And if you have purchased a particular content in a DRM'd form, you don't exactly have the option of switching to mp3 anyway, do you?"

http://www.mobileread.com/forums/sho...?threadid=6140
http://www.cdfreaks.com/news/13193