I had some time to kill the other day and noticed a used 2006 Prius HV battery pack on Ebay sold for less than $600 USD. It apparently came out of a car that had less than 6,000 miles. That got me to thinking...uh, oh....not again. Anyway, if I put 2, 3, or 4 battery packs in parallel, would the ECU know the difference? I'm only dreaming about installing multiple packs and building my own HV plug in charger for the batteries. Thoughts? Is it possible?