I have similar problems with the battery after the firmware update.

I've noticed the battery drains quicky when I'm in an area of bad cell reception (data and / or voice)

Anyone know if the data and/or voice radio is reflected in the running processes or does Nokia have a separate process that does not show up as a maemo process?

For my case, my CPU utilization is within general utilization rate based on what I read in this thread and my battery drainage seems to be very bad if the phone is left in an area of bad reception. Hence the question...