Ok here is the problem. I have a iPhone 4s since launch. I used to have normal usage and standby times, like 5-6 hours usage and 1 day standby. Then my phone started losing like 10% per hour and my usage time nearly doubled! I did a hard reset, reset all settings and finally TWICE erase all setting and wipe phone, set up as new and my battery life got normal again. Here is the strange part. Since then, Asa long as my pone is on, the battery life is fine. If I restart my phone, or battery dies or put airplane mode on, the phantom usage starts again and I have to erase phone and set up as new to fix it. Now I'm on 7 dAys with my phone constant on and I have like 0.5 to 1% drain per hour which is nice. Anyone can explain this bizzare bug?