I wanted to ask everyone: Can you only put up to a certain amperage into the lighter socket? I bought another cell phone adapter plug for my phone and it didn't work but the cheapie one I bought does? I believe the cheapie one says 2.4 amps. The Aukey plug I bought thru Amazon is 4.8 amps/24W. So does that mean I can use any 2..... amp plug but the 4.8 amp plug is too much for the car? BTW, I know it's got two usb ports and supposedly they're each 2.4amps. Maybe it's the brand???