Boost Battery Life Manually

1. To get started, you'll need to install File Expert on your tablet; it's available for free from Android Market.
2. Run File Expert, making sure to allow Superuser access.
3. Tap Menu, Settings, File Explorer Settings, and enable Root Explorer.
4. Navigate to the /data/data folder (see above), then locate com.android.phone.
5. Tap and hold on com.android.phone, then choose File Operations, Delete.
6. Navigate back to the top-level directory (/), then go to system/app.
7. Tap the tablet's Menu button, then choose Mount, Mount as Read Write.
8. Scroll down until you find Phone.apk, tap and hold it, then choose File Operations, Delete.
9. Power off your tablet, then restart it.