Battery pack available from a 2004 Prius with 373000km on it. Was able to drive the car to the shop but had all the symptoms of pending battery failure (dashboard lit up like a christmas tree, battery display going from full to empty to full to empty in seconds). It is packed up nicely in the Toyota box that the new battery pack had come in.
Let me tell you that you own a very heavy paperweight. Sell the chunk of batteries for recycling purposes to a metal scrapper and you will avoid further headaches.