I'm having some battery problems. when their plugged into the hub none will charge even if one is plugged in at a time. no lights no nothing. tried to do an update but go app said to use a battery than has 50% or more charge. none of my batteries are more than 50% because i don't fly too much. this is very irritating being that i spent $1300 on this and i can't even charge a battery. all started after my 10th time of use or so. again, i don't fly much. any help is appreciated