About a week ago my 4S was completely charged, just a few hours later it was completely dead. Tried to recharge but no good. Connected it to the computer but, still nothing. I unplugged it and left it over night. Got up the next morning and it was working fine, 100% fully charged. No problems for a week. Yesterday it was fully charged but, within a few hours is was dead again. Repeated the same steps as above nothing.
Any ideas as to why this happens? Wi-fi/bluetooth turned off as with weather.