I was a bit surprised when I opened the package for this charger as it was definitely not "retail packaged" as advertised. The mailing envelope contained an unsealed, flimsy plastic bag containing the charger. No documentation or any other information was included. I think the ad and the picture is misleading. So far the charger works just fine, although I've only used it once. It appears to remain "on" at all times as the green light stays lit under all conditions of cell phone and ignition status. Not sure if it is drawing power from my car battery all the time, but it seems likely.