Uh . . . no, I don't think he was referring to engine timing or carbs.  I think he meant that a voltage regulator for a lithium battery needs to be very responsive to the special needs of lithium batteries.  A lithium battery does NOT like to be overcharged . . . period DOT!!  Yea, I work for Boeing and believe me, that 787 lithium battery problem was embarassing and Samsung should have paid a little better attention with their cell phones.
  I will stick to other battery technology for a while.  No lithium batteries for me and all you need to do is run a Google search to graphically see why.
Rick