Wow, looks a lot like those being sold for replacement packs for the first gen insight. I think a guy was selling 50 or 55 for a 1500 bucks.
Any reason you arent going to use these in place of your accessory batter in your prius? If your prius charging system works like the Honda IMA it should cycle off and on less frequently and hold a better charge than any lead acid battery. Most Hondas use the ELD to cycle the alternator or charging system off and on as needed vs a constant like on a typical altenrator use vehicle.
I use to charge my accessory battery before driving my Honda as a kind of mini test of the benefit of a phev and for the first few miles I had great fuel economy till that charge wore off.
How about replacing the pack in your prius with a few of those?
