It should work fine. USB uses a standard voltage, so anything that has usb will have the same voltage. The amperage, which determines how fast the phone charges, could be different. I believe the stock AC charger puts out 1000mA. Most car chargers put out 500mA, which is enough to charge, it will just be slow. If your charger puts out less than that, it may not charge at all, as the phone will be drawing more power than charging.