I got unlocked iphone 3g running 3.1.3 which I have bought used. I am curious to know my actual mah level when full charged (or battery health). Is there an app for that? I didn't find anything in the app store, cydia maybe? Also I am looking for a patch to show my actual battery percentage( as in real %, not where it still shows 100% after an hour of use, then starts dropping.)