9V Battery with DC Jack Cable

A 9V battery to DC jack cable is a convenient adapter used to power electronic devices directly from a standard 9-volt battery. It is widely used in DIY electronics, prototyping, and educational kits to make circuits portable.

One end of the cable features a standard snap connector that clips firmly onto the positive and negative terminals of a 9V battery. The other end is a male DC barrel plug designed to fit into matching female power jacks found on various circuit boards, most notably Arduino microcontrollers.

Here are the standard technical specifications for this cable:

• Voltage Output: 9V DC (directly transferred from the battery)

• DC Jack Size: 5.5mm (Outer Diameter) x 2.1mm (Inner Diameter) - this is the most common barrel size for consumer electronics.

• Polarity: Center-Positive (The red positive wire connects to the inner tip, and the black negative wire connects to the outer sleeve).

• Cable Length: Typically ranges from 10 cm to 15 cm (about 4 to 6 inches).

• Connector Type: 9V Battery Snap Clip (often T-type) to Male DC Barrel Plug.

• Materials: Copper or brass contacts, PVC wire insulation, and ABS plastic housings.

• Wire Colors: Red (Positive +) and Black (Negative -).

Common Applications:

• Powering Arduino Uno, Mega, and compatible microcontroller boards.

• Creating portable power supplies for remote sensors and IoT modules.

• Testing circuits on breadboards that have a DC barrel power module installed.