This charging adapter is perfect for soldering on your own connector to match up with whatever battery you have. Features 4mm banana plugs on one end and tinned wire on the other.

This is a female T-style ultra plug pigtail from ProTek R/C. The ultra plug is connected to 10cm of 14awg silicone wire.

This is the Traxxas Molex to Reciever Pack Charge Adapter.  Features: Red and black colored Made of durable material Connects receiver batteries to chargers with molex output connector Includes: One Traxxas Molex to Reciever Pack Charge Adapter