Hi there! I just ordered the ijoy captain which is mounted with a pair of 20700 batteries which is a nice gesture from the manufacturer. Upon looking at the data, I noticed that the type is li-ni (presumably lithium nickelium?) As opposed to li-ion of 18650 batteries. The question is, can the 20700 batteries be charged in the same nitecore charger as the 18650, on the assumption they fit the slot??? This might sound like a silly question, but I'd better be safe than sorry... Many thanks in advance!!!