the above is a 4s connector (just used for a quick reference as i was walking out the door) but the only difference in a 4s and a 2s is the width of the plug, the 2s is 3 wires wide (the 4s above is 5 wide). i use Duralite lithiums so i'd hate to just guess what may be on your battery, it sounds like a E-sky, but there are quiet a few balance plugs floating around, why they can't use a common universal is beyond me. you might do a search for the E-sky or Thunder Power plug and see if they match up with yours, but be forewarned, some companies use the same plug with different polarity connections