I bought this charger because I can charge my camera batteries in my vehicle and because it will charge two batteries at once. I have not tried the car charger feature yet but I am very happy with charging batteries from a house plug. I have been using it for about 6 weeks now and have charge all my batteries several times and they all work. It shows how much charge the battery has when you insert the battery and it very accurate. I highly commend this charger.