BB Z10 and iPhone 4S - battery comparison?

Hello,

I have BB Z10 and I think about change it to iPhone 4S because iOS has more apps that I like to use. Battery in Z10 is very well but I dont know nothing about battery in 4S. Someone can tell me somthing about battery in iPhone? Is 4S working the same time like Z10? Better, worse?

It is very imortant information for me.
Z10 is very good phone. I like it. But i like iOS too.

Best regards, Lucas.