RE: Two 5s packs or 1- 10s pack
After losing $300.00 on a brand new 10 cell pack with a bad cell (the vendor would not replace or repair it) I seldom buy anything larger than five cells. I am flying a 10 cell Clipped wing Cub on two 2S and two 3S packs. If there's any power loss due to resistance or weight penalty it is not apparent to this sport flyer.
Walt