Mobile phone car charger into USB power
I have a USB cord which I can use for my mobile phone and PSP console. I also have a car charger for my mobile phone. My car charger has 5V at 1A which is best for mobile phone and PSP. I want to know if I can change it so instead of plugging my mobile phone directly into it, I can add two more USBs on it.
If so, will it cause any damage if I attach another USB machines like LEDs, fan or any other gadgets? The USB can supply 500mA, can it supply full amp? Or will it damage my anything that I will connect into it?