gifi battery

Today I lost my #1 H480 copter due to a suspected battery contact failure. I was beginning a cell tower inspection, all pre-flight checks were performed without issue and the copter was ascending to an altitude of 63m. All of a sudden it lurched and then dropped like a rock, crashing heavily in...

I have a GiFi 8050 battery that I bought brand new for my Typhoon H. I noticed when I got it had a slight teeny little rattle on the inside of the case. It has not affected the performance at all. Does anyone have this battery with that little rattle or experienced the situation before...