ChgJRT : Adaptive Charging Connector for JR PROPO transmitter batteries that have the small Black T connector. (Found on TX models such as XP-8300, XP-8103H, XF-400, XP-6102, Century 7, XF-421EX, X-347, R-631, XP-783, XP-642, XP-652, XF-622, J-Line Quattro, and more.Has wire leads. Polarized for proper connection directly to battery pack. Has 6″ wire leads for hookup to your stand-alone charger.