Without a question one of the best features in Phantom 2 & Vision is the prolonged flight time (20-25 minutes) due to its huge battery. The battery must have a good capacity/weight ratio to enable flight times up to 25 minutes. In other hand you can change the motors and propellers from V1 to match with P2&Vision, but it still requires a battery with larger capcity to flight as long. So far I've seen "hacked" Phantom V1 to carry 2-3 batteries, but as everyone knows the capacity/weight ratio makes the efficiency quite poor. Having two batteries instead of one, may increase your flight time only like 33%. And having three batteries has even worse efficiency. Is there something unseen on the Phantom 2/Vision battery, that makes it light weight and theres nothing like it on the market yet? Questions -What's the longest flight time you've been able to achieve and how did you achieve it with Phantom 1 & what was the payload (I'm interested on payloads including a GoPro, gimbal & video transmitter) -Does anyone have good tips or tricks to hack your Phantom so it can fly up to 20 minutes with a large payload?