The Duralast battery in my 1995 F-350 appears to be completely dead. It is only 3 months old. I got it in February at AutoZone. It was fine until I inadvertently left the ignition switch on for several days and it discharged completely. I have placed it on charge in various charger settings: 12v 12amp automatic; 12v 2amp automatic; 12v Activate. The charger needle barely moves above zero in any of these settings..
I left the charger on 12v 2amp overnight but there is no increase of charge rate and no sign of power to any component, i.e., the dome lights still don't come on and the charger needle still indicates little to no charge. I removed the battery cables to make sure the terminals and charger cables were getting good contact.
Would leaving it on charge for a longer period bring it back to life or is it gone?