What I have is an old BlackBerry charger that has a USB port on it so you can use any USB cable with it. Everything is the same as the iPhone power adapter except for the amperage - it's 0.5 amp compared to the 1 amp of the iPhone adapter. Can I use this to charge the iPhone without any problem because of the lower amperage? I know that it probably wont charge as fast as it would with the Apple adapter but I want to make sure I'm not going to destroy an iPod or iPhone with it.