Well this has just happened to me for the 10th or so time and as I had MacRumours open I decided to write this..... I just picked up my iPhone 5 which had 18% battery showing, I took 2 pictures with the flash on and then the phone died. This also happened yesterday when the phone was on low battery, double figures but showing red. It isn't too bad when using the flash as a torch but when I take flash pictures it rinses the battery. This has happened loads of times before, I remember I was on holiday one night and taking a load of pictures with the flash and then phone just died on 27%. It isn't as if the phone rapidly goes down to 1% and then dies, it just goes to the black screen and makes me plug it in to get it going again. Has this happened to anyone else?