2000 Gem Beeps when charging

GEM Forum
1

Just bought a 2000 Gem Car, Just replaced all batteries with AGM Deka batteries. Car drives and everything works. When you try and charge it constantly beeps.
Also not sure how to change the battery type, i see the dial but dont have a diagram for what position is what?

any help is appreciated
thanks

2

What code is given on the gauge? I know that “F” is for flooded batteries and “C” is for gel style. I am not sure what the setting for AGM would be. They are a type of flooded cell but it is absorbed into the glass mats.