I don't have my book and I want to keep my batteries charged up. It's a Motormaster charger with settings for 6V below the switch 6A above the switch 12V below the switch 2A above the switch 12V below the switch 6A above the switch Which setting is the one for a slow trickle charge? The battery was only used about 10 times and I just want to keep it topped up. Thanks. I think it's 12V 2A, I'm just not sure.