If you looking for a UMPC but have been holding off because of the battery life, take a look at the SamsunQ1B which has the Via Processor. You can see from the numbers below there is a significant difference in battery life between a Q1 with a Via C7 ULV 1.0 GHz and a Q1 with the Intel® Celeron® M ULV (900MHz).
While I did not have both Q1 UMPCs here at the same time, I can tell you that the only notable differences in the feature set is that come to mind is the sound quality which is due to the fact that the Q1B has only one speaker the Q1 has two, and there is no card slot on the Q1b. As the majority of the features of the Samsung Q1 are the same, this page is intended to inform you only of the battery life differences Read the Full Review of the Samsung Q1 Ultra Mobile PC and its Features Here
Samsung battery manager showing customized setting Used for battery test
Both machine were tested in the same manor, which is always on mode, wireless on, no standby, no hibernate and the screen and hard drive set to always on. Both Machines were running Windows XP.
Q1B with Via Processor:
Battery Life: an amazing 4 hours and 16 minutes in always on mode, wireless on, no standby, no hibernate and the screen and hard drive on. Which is close to double the battery life of the Q1.
Keep in mind that you should get another 1 or more hours of of battery life if you were to use "Max Battery Life" mode from the pre set in the Samsung battery manager.
For more more information on the Via Processor click here
Q1 with Celeron Processor :
Battery Life: 2 hours 37 minutes in always on mode, wireless on, no standby, no hibernate and the screen and hard drive on.
Below are the comparison charts of the Q1 and Q1B Specs
was a review unit and not a new package it may just have been missing. 
