In a similar vein, I learned the hard way that my old battery charger wasn't up to the task charging my AGM, seems the AGM to get to full charge will need more amps over a longer period of time. Some research showed that 2 battery chargers in my price range met the new standards for AGM. The one I picked up was from the Craftsman line. And I have had great success with it. Even on a few friends cars. Their chargers failed to get things done and they knew I had that new charger so we tried it and it does work better.