Does enabling wifi improve battery life?

[Mojary]

i can't believe there's even a discussion about this. look, i've tried both evdo connection and wifi. and from my experience, my phone's battery drain was faster when i connected to my home's wifi compared to when i was downloading the same files using my phone's regular evdo internet connection.

and eschelon is correct. regarding batter life on the iphone/palm pre using wifi and comparing it to the tp2 that runs on WM. that's like comparing apples to oranges.