What is a charge controller?

Hi, this is a very useful thing that will save your battery. And prolongs its life. We recently bought one too. There were so many of them that we were confused. Picked a pretty good one here https://a1solarstore.com/battery-charge-controllers.html. Even with a good discount and delivery. Very satisfied. I think this purchase was worth it.

My battery lasted much longer with the controller. It really turned out to be very useful for me.