Your battery is not okay. A fully-charged battery will measure 12.6 volts. A good but discharged battery will read 12.2 volts. You're below that indicating it has a shorted cell or it is really discharged. You can try charging it at a slow rate for an hour to see if the voltage comes up. If it does, measure the battery voltage again once the engine is running. It must be between 13.75 and 14.75 volts. If it is low, have the charging system diagnosed.
Thursday, January 3rd, 2013 AT 8:12 PM