One of my biggest gripes with the XPERIA X1 was the lack of battery meter in a visible spot. To check the battery, you have to tap on the clock, and then you get a crude visual representation of what is left.
Fret no more, dear readers. At the X1 tips article from pocketables point out, with a free download of VistaHide Battery Guage, you can always see your battery status with a quick glance of the top bar. Just place the .EXE file on your device, and run it. This will work with any Windows Mobile touchscreen device, too.