Recently I had to replace the hybrid battery on my 2001 Prius with 122,000 miles. I'm now selling the old battery. I was told by the dealership that 2 of the modules (cells) were below specs. They were able to charge one back up, but the other would only hold about 15.56 volts and it should be around 17. The 2 bad modules were marked by the dealership. Here are my experiences and pictures of the hybrid battery: http://priuschat.com/forums/showthread.php?t=40050 If you're interested, please send me a private message or click on my name to send me an email. Thank you!