Here's a review from the Associated Press that tested the Treo 600, the Windows-powered Hitachi G1000, and the Blackberry 7200 series. The reviewer says that <A HREF="http://www.portervillerecorder.com/articles/2003/12/04/ap/HiTech/d7v7jvv81.txt">battery life</A> remains a work in progress, and heavy phone users are likely to be disappointed. All three devices hold enough juice to carry you through a busy day, so long as you go easy on the emailing, browsing, picture-taking and music-playing.