I have just had my 2nd replacement 6680 that has failed with the same problem. after only one day of use with both of them, on the 2nd day they have both failed to charge on either a wall or car charger.I don,t know if there is an inherent problem with the 6680 or could it be my chargers or battery !!!!!, but it seems odd that they both failed for the same reason !!!!!
Can any one please help !!