I saw this on Prius Technical Stuff: source: Prius Technical Stuff This I can understand because the NHW20 modules are so much better than the first generatn, NHW11 modules. They truly are worth refurbishing. If Toyota has changed the core charge, it suggests they are getting serious about removing the 5% failed modules and getting the 95% back into servic mode. Can anyone confirm a change in core charge value for the NHW20 and later modules? Bob Wilson