i have this car charger i bought from att and when plugged in to my iphone it shows the full battery plug in my battery when i plug it in and its only at liuke 30 percent then it charges for a lil while stops and keeps doing that over and over. so i thought it was a charger issue so i bought a new charger from att then i thought it was my iphone 3gs so i went to apple store and got a new iphone 3gs and its still doing it but doesnt do it with my wifes iphone 2g