What can I do to increase battery life on my Android tablet?
The key was to delete the Telephony application.  This tables has no phone.  After deleting the following built-in applications, TelephonyProvider &amp; Phone, A new icon appeared in the top box, it was a signal bar strength icon with an X in it.

Now the "Cell standby" no longer appears, and the battery lasts 3-5 hours depending on what I am doing.