Part #: PTK-5315
This is a 2S balance/charge adapter from ProTek R/C. This adapter is designed for 2S Li-Poly hard packs that use two 4mm bullet connectors for the main power connection, and a 2mm bullet connector for the balance connector. This adapter has bullet connectors on the battery end, a female EC3 plug to attach to your charge lead, and an XH style balance connector to connect to your balancer on the other end.
ProTek RC 2S Charge Balance Adapter EC3 Plug to 4mm Bullet Connector PTK-5315 - is currently on backorder. You may still purchase now though and we'll ship as soon as more become available.