Yes, that should be possible. However i would try to figure out what the actual voltage is that the board requires, since there are almost no electronics that actually run on 12v. There is probably a 7805 regulator inside of the thing which converts the 12v input to 5v. Anyways, of it does need 12v you could use a boost converter to get your battery to 12v (very inefficient, not recommended) or you could use a 14.8v battery pack in a 4s*p config. Anyways, can you take a picture of the board?