I recently bought an a USB to the car's charging port adapter, but it's very bad. It charges the iPhone very slowly, as if it's connected to a PC. I need a recommendation for a good car charger, of which will charge the phone exactly as if it was connected to the wall. I don't want it to be too strong, so it won't risk my battery somehow... Just within the limits of what Apple recommends (I don't have any knowledge about this subject, but I'm pretty sure Apple stated what the voltages limits are, or something like that). Thanks anyway.