How do you Charge a dead AGM battery?

To charge a dead AGM (Absorbent Glass Mat) battery, use a compatible smart charger designed for AGM batteries, as it provides the correct voltage and charging profile. Connect the charger to the battery terminals, ensuring correct polarity (positive to positive and negative to negative). Set the charger to the appropriate AGM setting, if available, and begin charging. Monitor the charging process to avoid overcharging, as AGM batteries can be sensitive to excessive voltage.