Asking for BIL, dumb that I did not know the answer. If he replaces 3 AGM's, (TM use for a 36V), with 1 36V Lithium battery. If you had duel purpose 4 x 10 charger do you hook 3 charger leads to the 36V battery? He will have to get a new charger, has older Dual Pro 4 X 15, (I think), but asking the question. So. he would have 1 31 AGM crank/electronics and 1 36V 60 AH Lithium for TM. Thanks in advance.