
Originally Posted by
NoBloatware
You might want to check out Llama - Location Profiles, which is free in the market.
Another thing to try is using WIFI at the office if available. If you turn your WIFI sleep policy to never then the phone will favor WIFI over 3G even when the screen is off. Two caveats:
1) if WIFI sleep policy is set to never and you aren't around WIFI then you will be wasting some power
2) Theoretically, this only works for poor 3G signal. If you have no 1G either then your phone will be burning power trying to stay connected so that you can receive calls/texts (even if connected to WIFI)