Battery life on Intel based W8 tablets?

Hi guys,

I want to buy a tablet with active digitizer for note taking. AFAIK, I don't think any tablets with RT have a digitizer so my choices are limited to the Intel ones. So for anyone who bought an Intel based tablets from Acer, Asus, Samsung, Sony, and etc, could you post:

-Tablet Name

-Real usage battery life

-What types of activities you did to get that battery life.

If I find that the i3 - i7 based tablets have acceptable battery life then I'm going to wait for the Surface Pro. If not, I'm just going to buy a clovertrail based tablet.

Thanks in advance!