I read all of the reviews about this Odyssey battery being the best.  The first one I got had a voltage of around 11.2 which is mostly discharged - not good for a battery that is not deep-cell.  I attempted charging the battery, but it would never hold more than 12.5 volts: a useless battery for cranking anything.  I called amazon since the battery could not be returned.  The told me to keep it and they would send a new one.  The new one came in a few days and it was fully charged and did fine.