In Sydney 6500mah batteries for $90 au , I will buy one and post results I was conned into buying a drone with two swelled batteries both are 11.1 and 12.4 v on tester but both say critical as soon as its up 20m ? Are these troubles common I'm a ph4 fan and unsure if I went to wrong bird now , my upgraded antennas gave me 7klm range with another person at landing point as return was risk on battery and 2klm was open ocean . let me know guys if have any good results with q500 4k