Sorry this pertains more to the iPhone that iPad, but hopefully someone knows the answer. I also dont see anywhere on the JB section where you can ask general questions so forgive me if this is the wrong place.
I jailbroke my new iPhone 5 tmobile 2 days ago since it came with 6.1.2 on it. But I am having absolutely abysmal battery life. I can see the thing ticking down practically every minute as I use it. And this is light use, just in settings or sending imessages. When I am on a call it seems to go down like water. While my iPad can sit at 100% for 15 minutes of heavy use this new iPhone acts like a generic android phone as far as battery goes. I have tried various battery tweaks from push to notification centre to iCloud etc. and nothing seems to work. Even in Airplane mode it seems to just deplete so fast. I even disabled diagnostics and sending etc to test. What I am thinking is I want to restore the phone but I am scared that I will lose my ability to re-jailbreak. If I restore the phone through iTunes, will it force me to update or will it restore first then ask me if I want to update to the latest build?