By blessing the rings, the priest makes them "sacramentals." A sacramental is an object that is sort of a "touchpoint" for one of the Sacraments. So, the holy water that we Catholics use when we walk into the church is a sacramental of our baptisms, ...
Depends on the charger, read the manual, as stock charger vary from 2 or 3 hours all the way up to 6. My advice, throw away the stock charger. I picked up a smart charger for about $25, and it is adjustable for almost any type of hobby battery, is ca...
Initially NiCads or Nimh batteries need to be charged overnight for the first time use... Then afterwards 6 to 8 hrs charging of totally dead batteries ought to be enough...