couldn't you just set it up to check once an hour and connect automatically and use the auto disconnect app?

set your search interval to never if you use your cell phones apn to connect and your battery will last a heck of a lot longer.

I noticed my 3g i can leave my 3g internet connection on and my battery lasts all day. That search interval really drains it. Also, skype and any other kept alive connection drains it. I used my battery up in 6 hours before but now i can get it to go 10-12.