I recently noticed that my iPhone battery after a full charge drops to 2% and shuts off. Hours later I tried putting it back on and it powered on normally at about 75% battery life. I took my phone back to apple and they did a restore on it and said it was a software problem. Three days later the problem continues to happen. I'm still under warranty the iPhone is the 3GS 32GB model. What should I do I don't want to continue dealing with this. Will apple replace my phone or try to fix it? Also if they try to fix it will I have a phone to use in the mean time or will I be without a phone? This is the apple store I'm dealing with so I'm face to face with a "Apple Genius"