this is cable is not origianl 1,this cable can only be used for charging.can not flash firmware. 2,compatible with 6870 9070 8050 8070 9150 9170 xt xtr series controller and display. 3,if your battery runs out ,you need use original charge cable to activate first,then this cable can work. 4,better use 5v/1a charger to use this cable,powerbank is a nice choice. About the Led indicator:1,Charging mode:Stay red light,Red Led lights slowly(charging slowly,almost full charged)2,full charging:Green Led lights3,Not charge:RED&GREEN Led lights quickly.