My phone won't come on
I charged my phone over night and unplugged it in the morning and my battery life was 1%, I checked the plug was on and it was and my charger works fine with my wife's phone. My phone (iphone 4s) turned itself off after about 10 min. All it shows me is an empty battery when I try to turn it on or when I reconnect the charger. If I leave it for a few days (not plugged into the charger) and then try to turn it on, it comes on with 100% battery life. This has happened on more than a couple of occasions now over this month. I only got the phone from new at the end of January. The apple shop has not been very helpful and was hoping someone on here might have any ideas????
iPhone 4S