A curious question for the OP. You did mention above that you can go about a week before needing to charge the phone without using wifi, and that you are worried about battery drain using wifi.
So my question...is there a hardship of some sort with your situation where charging the phone sooner than once a week is a bad or inconvenient thing? It seems quirky to me that you seem worried about earlier charge times.
Have you tried a period leaving your wifi on with no change in your user habits and seen what your charge need is then? What would you consider a no deal charge time? Once a day, once every two days?
Just curious questions as your running on a different paradim (sp?) than I am.
It isn't that big of a deal.. I just come from ~6 years of windows mobile.. so used to dealing with awful battery life that I don't really have to think/worry about my battery with the iphone.. especially the IP4.
I don't really care about the "using a full cycle on a partial charge" because this battery shouldnt start degrading until well-after i get the next iphone next june.
its just not a big deal.. I plug in at work every once in a while when I want to put some music onto it or to install apps that I've downloaded on itunes and need to sync, so it will get a little charge during that. usually the only full charge i give it is on sunday night (if i take my macbook home for the weekend) or monday morning (if i dont).. by the end of the weekend i'm usually running low since i dont have a computer at home and i dont make regular use of the outlet/usb cable
There are, of course, exceptions.. drunken phone calls, etc, but i just try get out and do stuff and not to live off of my phone/laptop/ipad..