Originally Posted by
TheRealAndy
This is a good point. When you battery gets close to a full state of charge, it will draw less current. If you have the ability to supply extra current, then some of that can power the accessories whilst the battery is getting the most it can.
This is not true. Dont believe everything you are told. AGM's are far less tolerant to abuse, especially when charging them. They excel in deep cycle applications because you can discharge them to a lower state of charge, and because they can accept a higher charging current.
The reason flooded lead acid batteries are still used in cars over other types is simply because they can stand a lot more abuse. Because they are abused, they are dont last, but an equivalent sized AGM in the same situation would be getting swapped out much more frequently.