Why do you use such large capacity batteries? When I charge my planes before going flying my charger tells me how many amp-hours it adds - it is between 200 and 300 mah after a tytpical day of flying. I fly with 650 mah packs. You don't need high amp capable packs for powering receiver/servos for small planes. My planes draw less than 1/2 amp from what I see.