That's what nice about the "micrometer" dial-in knobs I fitted to the Vishay pots. AGM batterues DEMAND to be charged at LOW bulk voltage set point until amperage decreases to ?1% of total amperr hour capacity before deflectimg to float. How ya gonna do that with a smart charger? In your dreams. If by some miracle I am alive to see the end of my Lifeline I would be 83. Treating any battery correctly leads to a phenomenal lifespan. I had 29 plate 8-D's that survived 1000 cycles before I gave up. Flooded Ramcar Philippine batteries. But that happened a quarter century ago.
You can PENDANT until you faint but any charging system that does not allow adjustable length of time spent at max voltage absorbsion limit is not acceptable. A huge flaw. In the case of AGM batteries it's that less than one percent goal. With flooded reaching 95% of full charge gravity is the goal as the lag over run chemical reaction will continue to raise SG
