Buyer Beware, the Marcum PanCam App is not compatible w/my Nexus 7 Android Tablet.
Best to check before plunking down your dough.
Looks like I'm sticking w/my Vexilar FishPhone.
As for phone battery life while viewing. I purchased this...
http://www.monoprice.com/mobile/Prod...1083110&cpnCd=
For $30 I get 2 full charges, coupling that with turning the tablet's brightness to 60% it lasts me all day. In a dark tent 60% is more than enough to see perfectly. As an added bonus the built in flashlight has come in handy more than once.