Does the phone working off edge affect the battery? Normally my phone works fine all day at work even with me using it, but when I'm at horse shows which are usually in east bumble somewhere so there isn't even any 3G, the battery gets sucked out super fast. I have sync, blue tooth, gps etc all turned off and only use it to communicate with people elsewhere on the property. No apps or anything being used.
that has been the case for me also. At home I get edge only. My battery could go from full charge to about 45% overnight.
Now I turn off the Mobile Network connection before I go to bed and in the morning I still have a full charge.
You can create a Widget to the "Mobile Network" switch. it is in the Widgets under Settings.