My battery was 100% before I jailbroke. I have been playing around for 2 hours, and on 3G for at least 15 minutes. 3G drains the battery more than wifi. I am only down to 98% now. This is an unusually slow drain. My sensors app agrees with the built in battery indicator.
Does Jailbreaking Improve Battery Life?
Does Jailbreaking Improve Battery Life?