I have a 7 cell battery and a 6 cell. When I switch the two is screws the trim up because the 7 is heavier. Its more that can be adjusted with the controller. So instead of retrimming it everytime and end up spending a battery getting it trimmed I just leave it and it climbs all the time with the small battery. Its a pain because I cant dive to start my loops. Any suggestions?

Also, is their any other batteries that will fit into the plane besides the Hobby Zones. It says you are supposed to get 10 to 15 minutes of flight, but I am lucky to get 6 or 7. Its dissapointing because I have to drive 15 mins to a feild to fly and the batteries are dead in 20 mins. Makes me wanna get a plane with a gas engine really bad.