Use this Battery Connector cable to connect a 9V battery to anything. Useful to power-up development boards (like the Arduino) with a 9V battery. The cable has a molded  9V battery snap on it. The battery snap covers the battery contacts to prevent shortcircuits, and it’s made of plastic, so it is more durable than traditional clips. The polarity on the plug is positive at the center.9V Battery Snap Connector to pins for Arduino.Wire length 15.2mm (6 inches Approximately)

• 9-volt battery connector
• leads are polarity color-coded (red and black)with plastic Head
• Wire ends stripped and tinned

Minimum Quantity For Delivery: 4