EC2 / EC3 / EC5 Connectors for High Power ApplicationsEC2 EC3 EC5 Connectors for High Power Applications Description: This series of EC connectors are popularly used in the RC industry for high power supply applications by Lipo battery packs. Hobbyists can use them to make their own power cables with high current resistance wires. It is suggested to use high quality wires for power cable making. A crimping tool is need for the creation. EC2 uses 2. 0 banana plug EC3 uses 3. 5mm banana plug EC5 uses 5.