I too have had pretty poor battery life with my 4S. I restored the phone and set it up as new since this regularly fixes strange issues. I've added iCloud and exchange back on and every 2-6 mins an awdd message is in diagnostics. No idea what it is but I'm trying to figure out root cause. I've completely discharged the phone twice to "calibrate it" and yesterday the phone was at 1% at 8:45 5 hours 20 mins of usage 14 hours 12 mins of standby Mostly email/web and messaging for the day.