Daklein: Thanks for your pioneering spirit in this area in general and your response to my question in particular! One follow-up question: should this device also work if one were to replace one's original pack with a smaller capacity one? E.g. one buys a new 62 Leaf (for the newer features, etc but doesn't need that amount of range) and decides to exchange it with someone else's Leaf with a 40 (or even a 30) battery pack? (I guess this may make more sense if the device cost drops significantly, which should happen eventually.)