You all wasted no time driving home your opinions about USB car chargers, but once the dust settled, Aukey’s inconspicuous dual-port charger (unsurprisingly) finished the race with an insurmountable lead.
I like it because the face is almost flush and on cars that have a flip up port (like a 97-03 5 series), it folds down with it out of sight. Only issue would be if you take this one out to other cars, then it can be hard to remove frequently. -spngr311
Similarly, I have a flip up port on my E46 (‘03 3 series) and this is the only charger I can leave in all the time.
I never thought I could love any USB car charger, but this one has proved that wrong. - tstout
If you own a newer Android phone, Aukey also makes another version with a pair of Quick Charge 2.0 ports. Unfortunately, it won’t sit flush in your car’s outlet like your main pick, but it’ll help you maximize your charging time during your commute.