I just received my new Thunder AC680 charger to replace my original AC680 which blew the a.c. power supply one week ago and guess what???.....after running for about 50 minutes this new 680 went POOF and just died just like the first one! Still works on my car battery,so I will be buying a power supply to run them both for now.
I would not normally go "cheap",but there seemed to be a lot of people using this charger,so I went ahead and bought two,but I learnt my lesson the hard way!
Maybe they(two AC680's) had trouble charging my 6s lipo,but only charging at 4.0 amps!? Huck50