I'm hoping by the time I need to replace my battery pack (06 FEH) that somethiing newer, lighter and more powerful will be available as a "drop-in replacment". (ie li-ion, A123, M1 - all the same I think, etc...)
Anyone given any thought to how much this will improve the overall MPG? - given the weight and power differences? Just curious for you Engineering/Physics types out there....