When I buy a heli kit I usually get an extra battery tray and battery straps. Nice to have so while you may charge one set you have the other set to put in the heli to fly and so you need this velcro set to use on the other battery tray. Also if it wears out you have extras to replace the older velcro..
M
Michael P.
Works To Hold Batteries
Works great to hold batteries in place with straps. There thin as well to keep the batteries fitting in place.