Can not understand the first Rezesion, this USB car charger works the way it should be. Charging so Iphone and external Navi. Both need each about 1A. Iphone also makes no quirks. ('Ve read that appears in some chargers that this is not an original charger and therefore not invites, here works without problems!) Voltage measured - are exactly 5,04V. Status LED is quite bright, is the E46 but not within sight.