Just ordered my AT&T GS4 and need to order a fast charging car charger for it. I was just going over a thread over at XDA about using charger or cable other than the stock one would cause device to draw less current and hence charge slower, so just wanted to check here what you guys have been using reliably? I use navigation along with music streaming while using the phone in car, so would need a charger that can still charge the device while its being used heavily.