they said that one motor and the speed controller were at fault.
empirerc.com outta AZ, USA is the dealer, took about a month turnover...but got a new baby.
here is my phantom 1 at lake havasu on memorial day weeekend this year.
you can see the bird down on the driveway from the gopro.
https://www.youtube.com/watch?v=BPqxn4GBNCA
here is my video from my crash about 200ft up. dont think its a battery connection issue, rather one motor failure. make it turn like that.
https://www.youtube.com/watch?v=BPqxn4GBNCA