If you look at your battery stats, you'll see that the Device Standby process is sucking down a lot of the battery use... strange, that's the process for your cellular radio... and the Vega doesn't have a phone!
So, let's connect the Vega to the computer, and run the following ADB commands (these are from the android development kit).
adb shell mount -o remount,rw /dev/block/mmcblk0p5 /system adb shell mv /system/app/Phone.apk /system/app/Phone.OLD adb shell mv /system/app/TelephonyProvider.apk /system/app/TelephonyProvider.OLD adb reboot
The Advent will reboot and when it comes up it'll be no longer running the useless process.
You'll also get a notification telling you that there is no signal... annoying, but at least you know it's worked!
To undo the changes, just run this script.
adb shell mount -o remount,rw /dev/block/mmcblk0p5 /system adb shell mv /system/app/Phone.OLD /system/app/Phone.apk adb shell mv /system/app/TelephonyProvider.OLD /system/app/TelephonyProvider.apk adb reboot
Hopefully you'll find this hint useful, please click on an advert to show your appreciation :)