Battery life among Windows Mobile PDAs doesn't vary all that much from model to model. The screens are mostly 3" these days on the smaller models that are similar in size to the iPAQ 1940. Palm OS PDAs tend to have somewhat better battery life, but if you want WinMo, I'd suggest the HP iPAQ x1950 that replaced your 140. Here's our review: http://www.mobiletechreview.com/iPAQ-rx1950.htm . HP will be coming out with a few new Pocket PCs, but it looks like they've been delayed until Jan. 2008.
-------------------- Lisa Gade Editor in Chief, MobileTechReview