Charging voltage question?

KitCarlson said

AGM batteries have a different charging strategy. There are three steps in a charge profile, it involves voltage, current, and temperature controls. Using standard regulator for flooded battery, will shorten battery life.

Correct AGM regulators are found for marine applications, and are expensive.

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I've been using a AMG (Optima) batteries in my cars for the last 10 years and they have worked great. I have never had to change regulators to make them work or last, as long as the charging system in your car is working right, it will keep the battery charged. You have to use special AMG battery charger for storage and when you have a dead AMG battery.