9144m is 30k ft. The flight I made would likely have landed short, but the average air density is 1% higher now.30k ft mean 10km,i think i can not do that with the stock battery, even in zero wind, or maybe someone has made their 30k ft with their stock platinum i dont know, but i see your post lolo, it reach 9045mtr and battery on 0% when arive at home point...