The first time I charged my new iPhone 5 I used an old charger rather than unpacking the new one. I noticed after about 15 minutes that my phone was stinking hot. I checked the charger and it said "iPod charger" as opposed to the iPhone 5 charger that is "5W charger". Not to sure if this damaged it in anyway but it was scary how hot my phone was. So I caution you not to make the same mistake.