Voltage cutoff with 2x 2S.

[lincpimp]

I would suggest a higher cutoff value, such as 3.1v or 3.2v per cell. Gives you a little extra insurance as the lvc reads the whole pack, and a weaker cell could drop below 3v per cell if you are pushing the pack hard, and the other cells could hold voltage well enough to keep the pack reading over 12v.

If your 2 2s packs are wired in series 12v would be correct given a 3v per cell desired cutoff.