Issues with Binding
 

Please help! I'm new to heli flying and was given an Eachine E119 for Christmas. I've flown it outdoors twice now and 10mins in seem to lose connection with the controller and I'm then unable to bind again. I've tried putting new, fully charged batteries into the heli but just can't re-bind it. Once I get home I can bind again instantly. Does temperature affect the binding process or is there something else in the environment that is causing the problem? Why can I bind when I first get the heli out? It's so frustrating as I get a max of 10mins flying time and then have to stop. I've tried everything to rebind the heli but nothing works.