Better battery life with Wifi on
I also get better battery life with wifi turned on at work. I work in a metal building where the cell signal is weak at best. I have my EVO configured to get my work e-mail (Exchange). I discovered by accident that if I turn on wifi while at work it does not drain the battery nearly as bad. I assume it is due to the weak/lack of cell signal in the building. I turn it off when I leave work.
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