I am also needing to build larger packs. I need a 14s2p battery. What I envision is two 7s2p packs that can be charged individually on my Astro 109. At 2C I can get back in the air in less than an hour using only one charger. With my current batteries, it takes me two hours between flights. A little more capacity at a lower weight penalty would also be nice. Say 5000mAh cells?
Thanks,
Darrell B.