9v battery connector with DC jack 15cm for Arduino

The 9V Battery to DC Jack Connector Cable is a simple but extremely useful accessory for powering your electronics projects on the go. It consists of a standard 9V battery snap (the same connector found on familiar 9V battery clips) on one end, and a standard 2.1mm x 5.5mm DC barrel plug with center-positive polarity on the other end — exactly matching the DC power input on Arduino Uno, Mega, and most development boards.

This cable allows you to power your Arduino or any compatible electronics directly from a 9V PP3-type battery, making it ideal for portable projects, demos, robotics builds, and field testing where access to a wall adapter is not practical. The connection is quick and tool-free — simply snap the battery onto the connector and plug the barrel jack into your board.

The cable is approximately 15cm long, providing enough flexibility to position the battery comfortably within your project enclosure or alongside your microcontroller. The molded plastic battery snap is durable and provides a secure connection, while the high-quality barrel plug ensures reliable power delivery.

This connector is a must-have accessory for anyone working with Arduino or DC-powered electronics. It's also a popular choice for science fair projects, classroom demonstrations, and robotics competitions where untethered, battery-powered operation is required.

Note: The Arduino Uno's onboard regulator can handle the 9V input directly. For higher current loads or longer runtime, consider a rechargeable battery pack or a higher-capacity power source.

Specifications

• Cable Type: 9V Battery Snap to DC Barrel Plug Adapter
• Battery Connector: Standard 9V (PP3) Battery Snap — molded plastic
• DC Plug Size: 2.1mm (ID) x 5.5mm (OD)
• Polarity: Center Positive (+)
• Cable Length: Approximately 15 cm
• Wire Gauge: Standard tinned copper conductor
• Compatibility: Arduino Uno, Mega, Leonardo, and any board with a standard 2.1mm DC jack

Applications

• Powering Arduino Uno, Mega, and Leonardo from a 9V battery
• Portable Arduino projects and field demonstrations
• Robotics and mobile electronics prototyping
• Breadboard and prototyping power source (with adapter)
• STEM and educational electronics kits
• Science fair and classroom demonstrations
• DIY guitar pedals and audio effects circuits
• Small motor and servo testing
• LED projects and wearable electronics
• Wireless sensor nodes and IoT prototypes
• Replacement / spare power cable for Arduino kits
• Custom battery-powered electronics builds