Sadly I dont think the Diagnostic mode battery percentage is that accurate either. At least not when the battery is over a 50% state of capacity. Out of curiosity I have been charging my battery in this mode (Not expecting any calls) and it went from 3 to 50% in no time (Probably in less than 30 minutes) somethings just not adding up here. I will continue to charge the phone using this method and see if I get any better results.