Well, when all else fails, read the instructions. The 8 cells w/ BEC 10 cells w/o BEC was how my IPC Pro was made, don't know if the F1 Pro was like that.

Guess what though? According to Tower, the AI Pro is only supposed to have an input of 4-7 cells.....that sucks. I did put 8 through my brother's Novak Rooster and it handled it just fine (only supposed to take 7 as well), but I don't know if you're a gambling man. :D