What? My battery's dead already?

I got an iPhone 4 a couple of months ago and in general have been pretty happy with it. Then a strange thing happened in January - the battery was going dead in hours. I would go to sleep with a 100% charged phone and wake up to one that wouldn't even turn on. It acted like it was on all the time, even if it was in standby. Needless to say this was pretty annoying.

I talked to a friend at work, and it turned out he was having the same problem. After checking the internet he came across a solution - delete the mail accounts and then recreate them. Well, that made no sense to me, but it worked for him and I was desperate. I deleted the accounts, power cycled the phone and then recreated them. And what do you know, it seems to have worked.

So what's the deal? Apparently push notifications is a problem. I guess the phone gets stuck in a mode where it is always trying to get data even though there is none coming. And, the only way to fix it is to delete the accounts. Hopefully they will fix this in an upcoming release. Anyway, if you have an iPhone 4 and are having the same problem, here's a possible solution.