I would not expect to find any performance gains going from 16 volt from 12, not even a consideration. Why would it be?? My stuff cranks faster, cools better/quicker and takes longer to get to temp with 16V than it did with a 12v. The reason I wont do anything but 16V in a racecar anymore. Our dragster has 16V with an alternator and never needs to see the charger. Cools down in just a few minutes and cranks like mad. Same with the Stratus, just one 6lb 16V lithium in it, cranks considerably faster than it did with a 16V AGM.