Hello All, My (around 45 days old) iphone 4s is having issue with battery - it goes off (like battery has completely ran out) around at around 15-20% battery display. So looks like its reporting incorrect battery %, or the battery itself has gone wrong. I have also noted that it charges very slowly even when connected to wall power source (compared to my iphone 4). So I want to take it to genius bar, but not sure how do I demonstrate this problem convincingly - I don't want to give them chance telling me its normal - because my phone has died abruptly 3-4 times now when around 15-20% battery. Thanks in advance for your suggestions, hope I will be able to resolve this well.