Hello all, new to RC planes and I have a question about upgrading batteries for longer flight time.I have the "Dynam I Can Fly" model which has a A21 brushless outrunner (current: 1.8a- 13a, voltage: 7.2- 12.6) and 18A ESC. The current battery is a 11.1v 1250mah 10c li-po. Any suggestions for bigger batteries that wouldn't be to heavy for plane or knock the CG out..

Thanks
Troy