Origineel bericht door: Minho ,
If it weren't the fact that it does appear to work for a day or so, once in a while, I would suspect the battery as being at the end of it's life. Still, to be certain, use a battery utility, such as [http://www.coconut-flavour.com/coconutbattery/|coconutBattery] (for Mac) or [http://www.3u.com/|3uTools] (for Windows). It will tell you what the health of the battery is. Anything less than 70% of design capacity will require replacement. If the battery is fine, then you likely have a logic board issue. Has anything happened to your phone recently such as a hard drop, a repair or contact with water?