I have one of those chargers mounted hooked up to the batteries in my 923. This spring I'll permanently mount it. It does hold the settings so if you unplug it and plug it back in it will stay on 24v and the correct battery type. I don't know if it's detecting the terminals have 24v on them since they are hooked up already when I plug it in, but as long as it holds it I'm happy. I'm using the alligator clips for now, I'm going to have to cut the ring terminals off and put larger ones on to permanently hook to the batteries.