Last night (before your other posts) I decided to turn wifi off. I usually don't do this. I was really tired last nght and didn't want to be torn whether to read an email that came in so I thought easiest thing was to remove the temptation i.e. turn wifi off.
I had 1% battery drain last night just a little over 7 hours. Now that's impressive.
Weird - that's entirely normal for me on stock Vodafone JP3 - my wifi sleep policy is set to sleep when screen is off, and it doesn't ever drain more that 1% overnight?