Frank, who provides the BT driver that you’ve used as an example? It’s a valid example, but I don’t believe that it’s Microsoft that provided the Bluetooth driver in question.

I wonder how many other drivers are not properly configured in Vista yet and what is the impact in the battery life. Come on, 10% is not a small number.

I think that the major problem with battery life in UMPC is a combination of drivers problems and Vista not configured properly not by Users but by Microsoft.

For example, we recently found that the latest BT drivers that comes with every Q1p with Vista preinstalled does not have an option to turn off the BT Device. The BT device is using 10% of the battery no matter if it´s used or not.

In another hand you have recent findings about superfetch and memorypaging. These two were making an intensive use of the HDD which is another big power consumer.

At this moment I can tell you that I’m seeing in my Q1 almost the same battery life that I had in XP after all these registry changes and tricks. And I said almost the same because Vista still have more graphics and it’s a little heavier so you have to expect a little less of battery life because of the more use of CPU. But like Nick says, not that much.