If i have helped at all a click on the white star below would be nice thanks.
I don't know if the problems are related, but you aren't the only person to recently complain about battery temperature/drainage on a 3rd Ed. phone. See
I can't suggest anything, beyond what was mentioned in the other posts...
i updated my E5 phone to the latest firmware (v.81) and i have network problems too..
i don't have any battery problem actually, but the phone loses the connection to the network a lot of times.. which didnt happen before the update..
unfortunately i can't help you..
i'm planning to go to a nokia care point..