Edge and WiFi power consumption comparison

Wi-Fi uses the most power out of Wi-Fi, 2G and 3G.

If you install the Spare Parts app you can set the Wi-Fi sleep policy to turn off while the phone is sleeping so at that time 2G/3G (depending on whether you tick 2G only) will be used and will save your battery.

 

My personal observation is that EDGE uses even more power than 3G. Every time my Hero is on EDGE, the battery drains like crazy.

 

That's very odd, as WCDMA should use more power than GSM.

 

This isn't conclusive by any means but browsing on 3G seems to eat my battery faster than browsing on WiFi.

Does the G1 have a battery info screen indicating what it thinks is using the battery? I'd suggest starting with that and tackling those items first. There's not much point in futzing with things unless you're certain that they're drastically affecting battery life in your particular situation.