There is nothing to it. The connection on the bottom of the battery is just a center tap. A point in between the two cells inside. Using a digital meter, connect to the tap and one of the standard battery leads. Do this to determine positive and negative connection points. For instance, if you put the positive lead from your meter on the tap, and the negative lead from your meter on the positive battery main lead, and the meter reads a negative value, then you should place the leads from your charger on in the reverse of that order. Once you have determined which end is positive and which should be negative, charge with your lithium charger on a 1 cell 4800mah setting, if it is not automatic. When finished, take your meter and do the same between the tap and the other main lead. Once both sides have fully charged, your pack will be balanced.
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