Thought I would elaborate on the Charging system that was recommended by Larry Jacobs WA7ZBO.
We all use batteries of some type in our radio go-kits, I personally use a smattering of different AGM (Absorbent Glass Mat) Batteries. Mine come from old security, fire systems, and UPS systems that were changed out as regular maintenance. Now while used, they still have a lot of life in them if properly maintained. Here in lies my trouble, how do I charge these batteries so that I can squeeze the maximum amount of life from them. Larry gave me the answer and it is Genius.
So here it is:
de KG7RZX 73