I've been flying my Phantom 2 now for about 2 months. Still a novice, but slowly getting the hang of things. I have a Phantom 2 w/ Zenmuse Gimbal and GoPro Hero 3 Black Edition. The only item I added was the prop guards. Other than that, it's the same as it was out of the box. There's probably 7-8 hours total flight time on the bird and the 5200mAh battery. I've noticed my flight times falling. Since I've been flying a lot in some breezy conditions, I chalked it up to the extra power it has to expend to adjust to the conditions. However, this morning I flew in perfect conditions. I rushed out at 7:00am because the weather app showed "CALM" winds, which is unheard of where I live. Anyway, I ran the Phantom down to one bar and flashing red LED's. I got 15 minutes flight time. Any suggestions from you seasoned veterans?