If anyone is interested in a large upgrade I love the Himax 2812 0850 with 3 lipoly kokam 1500 mah and a Pheonix 25 ecs. You'll pay a little more for batteries but im getting over 20 min fly times and that is flying the first 10 mins in full throttle combat. Oh yeah and go straight up like no tommorow. Get a lot of spins in on one flight cause you can pull some serious altitude in no time. Put a 5 or 6 oz webcam on and it still climbs with attitude, more attitude than the 350 and the 8.4 volt without the cam.