Hi Crew, I have two 75/15 units, one Bluetooth, the other does not have this function, so, I need to know, am I correct in assuming, the non-Bluetooth unit automagically selects battery chemistry type when the battery is connected? I need to flick between calcium (ride on mower), lead-acid (wet) for LED lights etc, and possibly AGM, running many heavier duty 12v applicances. So, if it is not automagic, how does one select the battery type to ensure charging profile is correct?