In my current experience (EVO) the GPS and cellular data radios are absolute beasts at drawing power. -If only my cellular phone radio is turned on I get sever

In my current experience (EVO) the GPS and cellular data radios are absolute beasts at drawing power. -If only my cellular phone radio is turned on I get several days out of a full charge. -If cellular data and GPS are enabled, my battery life tends to drop down to hours and the phone becomes physically hot (about three hours). -Cellular data by itself probably cuts my battery life by half or more if left on constantly (about a day and a half). -Bluetooth has a almost imperceptible effect on battery life (four or five days). -Wi-Fi by itself probably drops the life by about a quarter or third (about two days).