my Magnetek model 6332 power centers' charging section has been replaced.I know this because the owner's manual has a revision date 3 years after my 1993 Itasca Spirit was built. The unit is a 6332s and the manual explains the 3 power levels of charging it does for the coach battery. I thought the 63xx series was a single stage unit. I have been looking at various web sites where it seems that "everyone" is updating the charging section because the old Magnetek boils batteries because it is a "Single Stage" unit. Wouldn't a charger that changes it's charging rate as described be a multi stage charger?