Does anybody know anything on the new iPhone 4s in terms of how long does the battery last, start up time, etc?

You can’t even get one until October 14th, so if you’re looking for personal experience, you’ll have to wait a few weeks. Otherwise, Apple claims these specs for the iPhone 4S. You can see the specifics regarding how they got the battery life numbers here.

With the new A5 processor, the battery life should improve from previous versions, which are quite good compared to say Android phones. That’s all I can say with any certainty.

I bought the 4s at a ridiculous price and I can tell you, if I knew about it what I know now, I’d stick with the iphone 4. The battery life is absolutely terrible on it.